I spend a considerable amount of time researching investments. I build financial models, evaluate companies, and use AI to compare competing investment theses. Given how much time I spend here, it might surprise you that I don’t track my daily expenses.
I track my net worth once a month and I review my high-level budget annually. But I couldn’t tell you off the top of my head how much I spent on groceries or gas last month, and I don’t care.
After more than a decade of managing my own investments, I’ve become increasingly convinced that personal finance is largely an exercise in allocating attention.
Some financial decisions can change your net worth by hundreds of thousands of dollars. Others might save you $100 a year. I’ve noticed that the personal finance community tends to focus on the latter, and says little about the former.
Not enough attention goes toward the decisions that have the greatest potential to change someone’s financial future.
Understand what actually drives your wealth
For the average person, building wealth requires some version of spending less than you earn and investing the difference. Your results are largely determined by how much you invest, how long that money stays invested, and the returns it earns. The first two factors are largely within your control, but the third can be unpredictable.
When you’re starting out, your savings rate often matters more than your investment sophistication. This changes as your portfolio grows.
An additional 1% return on a $50,000 portfolio is $500. On a $2 million portfolio, it’s $20,000.
At some point, investment selection, asset allocation, and tax efficiency can have an enormous impact on your wealth. But it’s worth understanding which stage you’re in before deciding where to spend your time.
The highest-return decisions are often made once
The most useful financial habits are the ones that don’t require constant attention. Automatic investing is probably the best example.
For years, I’ve had money transferred automatically into my brokerage account twice a month. The amounts have changed as my income and financial goals have changed, but the process remains the same. It eliminates the recurring decision of whether to invest or spend the money.
There’s a reason employers increasingly rely on automatic retirement plan features. Vanguard’s 2026 How America Saves report, based on its retirement plan business, found that 61% of plans offered automatic enrollment and overall participation reached 86%. Vanguard’s long-running research points to automatic enrollment and contribution increases as important drivers of retirement saving behavior.
The principle is straightforward: make the financially beneficial behavior the default.
Some financial decisions matter more because they prevent losses
Avoiding a major financial mistake can be just as valuable as making a good investment. For example, take credit card debt.
According to the Federal Reserve’s October 2026 consumer credit release, the average interest rate on credit card accounts assessed interest was 22.36% in August.
At that rate, carrying a $10,000 balance for a year would cost roughly $2,236 in interest if the balance remained unchanged. Paying off that debt can provide a much more certain financial benefit than trying to earn an unusually high return in the stock market.
An emergency fund serves a different purpose. The Federal Reserve’s 2025 household financial well-being survey found that only 55% of adults had savings sufficient to cover three months of expenses.
I keep emergency savings in a high-yield savings account. Because I don’t want to be forced to sell investments during a market downturn to cover an unexpected expense.
The value of an emergency fund isn’t just the interest it earns. It’s having the flexibility to handle a job loss, medical bill, or unexpected expense without disrupting your investment strategy.
I put adequate insurance in the same category. It’s not particularly exciting to review disability coverage or liability limits, but an uninsured loss can overwhelm years of otherwise sensible financial decisions.
Don’t underestimate the value of earning more
There’s a limit to how much you can reduce your spending. Increasing your income has a different ceiling.
Early in your career, spending time developing valuable skills, negotiating compensation, changing employers, or building another source of income may be a better use of your time than trying to squeeze another $200 out of your monthly budget.
Of course, earning more isn’t equally accessible to everyone. It can require education, time, flexibility, or taking risks that aren’t realistic in every situation.
But for someone with the opportunity to substantially increase their earnings, it’s worth treating career decisions as part of their financial strategy.
Investment costs deserve more attention than credit card rewards
Once you’ve built a meaningful investment portfolio, small percentages start becoming large dollar amounts. This is particularly relevant when it comes to fees.
The SEC published an investor bulletin in 2025 illustrating the impact of investment expenses. It modeled a $100,000 portfolio earning a hypothetical 4% annual return before fees over 20 years. With annual fees of 0.25%, the portfolio ended at approximately $208,000. With fees of 1%, it ended at approximately $179,000.
That’s a roughly $29,000 difference from a 0.75-percentage-point change in annual fees.
The financial activities I’d spend less time on
This is where I think a lot of personal finance advice gets excessive.
Credit card rewards. I know people who put extraordinary effort into optimizing rewards. If you enjoy it, great. But I’d be surprised if most people couldn’t find a more valuable use for those hours. Credit card companies are in the business of trying to get you to spend more, and rewards are one way they incentivize it.
Daily expense tracking. I think detailed tracking can be useful if you don’t know where your money is going or you’re trying to get spending under control. Once you understand your major expenses and have a sustainable savings system, I’m less convinced that recording every transaction provides much additional value.
Constantly changing investment strategies. There’s always a new market narrative, a new ETF, or a new asset class attracting attention. I think investors underestimate the costs of constantly reacting, particularly when taxes and behavioral mistakes are considered.
Small recurring expenses. I’m not particularly interested in the debate over whether buying a $5 coffee every day is financially irresponsible. It’s about $1,825 per year. That isn’t nothing, especially for someone working with a tight budget. But for a higher-income person saving a substantial share of their earnings, it might be entirely reasonable.
I’d pay much more attention to decisions involving housing, education, weddings, debt, and recurring financial commitments that can change annual cash flow by thousands or tens of thousands of dollars.
The objective is to make sure your spending is consistent with what you want your money to accomplish.
How I’d actually prioritize my finances
Once a year, I review five things:
Cash flow: How much money is left after taxes and spending, and how much of that is being invested?
Income: Is there a realistic opportunity to materially increase earnings over the next year or two?
Financial risks: Am I carrying expensive debt, holding too little emergency savings, or exposing myself to an uninsured loss?
Investment structure: Am I using available retirement benefits, maintaining an appropriate asset allocation, and avoiding unnecessary costs?
Time allocation: Am I spending hours optimizing something that has very little impact on my financial future?
AI can help with this review. Give it an anonymized breakdown of your income, expenses, debts, and investment contributions, and ask it to rank potential improvements by estimated annual dollar impact.
You don’t need a complicated financial dashboard or a subscription to three budgeting apps. Understanding where your money is going, which decisions have the greatest financial consequences, and a system that consistently moves you toward your goals is all you need.
The 80/20 changes as you get wealthier
When you’re beginning to build wealth, increasing income and savings capacity can make a substantial difference.
As your investments grow, portfolio construction, tax efficiency, and investment returns become increasingly consequential.
As you become financially independent, protecting your assets and deciding how to use your wealth may become more important than maximizing the next dollar of return.
The mistake is assuming that every financial decision deserves the same amount of attention at every stage.
I’ve spent a lot of time thinking about how to become a better investor. I enjoy the process, and I think there’s genuine value in understanding how to allocate capital.
But the less glamorous decisions I’ve made around saving consistently, controlling major expenses, and investing for the long term have been at least as important.
I’d rather get those decisions right and spend my remaining time researching interesting companies, building something new, or enjoying my life.
The goal should be to build enough financial freedom that you don’t have to think about every dollar.