I’ve always liked things that are systematic. A good system produces reliable and predictable results. Even simple routines like always putting your car keys in the same place makes life easier because it reduces the chance that you will have to hunt for them, especially when you have the least time to do so.

I even like the word “systematic”. When I hear it, I inevitably think of the musical Grease when Danny and the T‑Birds transform an old jalopy into a real hot rod singing, “Why, this car is automatic, systematic, hydromatic… it’s Greased Lightning!”

The song is full of hot‑rod slang and more than a few nonsense phrases, but it taps into something we all feel: the appeal of having things run smoothly. Humans are pattern‑seeking creatures. When something is systematic, we relax a little. We don’t have to think as hard. There’s less room for error.

Predictability lowers cognitive load and risk, and it builds trust. Most people would prefer a CPA who follows tax regulations carefully over one who improvises in hopes of squeezing out a little extra savings. A reliable system beats creative freelancing when the stakes are high.

Investing is no different. One of the most effective ways to invest is systematically through an employer retirement plan such as a 401(k) or 403(b). Beyond the tax advantages, these plans create discipline. Contributions happen automatically, whether markets are up or down, and that steady rhythm allows investors to benefit from dollar‑cost averaging. The system removes the temptation to time the market or to react emotionally. It’s been so effective that many plans now enroll employees by default and use target‑date funds to make the process even easier. The structure helps people do the right thing without having to think about it every pay period.

But not every system is a good one. A few years ago, my fitness club installed new lockers with four‑digit combination locks. It seemed like an upgrade, but I quickly learned otherwise. Even when I entered the correct code, the lock sometimes refused to open. After getting stuck a few times and watching other members struggle, I realized the system itself was flawed. It didn’t matter how disciplined or careful you were—the design wasn’t reliable. Eventually I stopped using the lockers altogether, and to this day I still see people asking employees for help getting into them.

And of course, unsystematic things aren’t inherently bad. Some of the best parts of life thrive on unpredictability. Humor, art, and innovation all depend on breaking patterns rather than following them. A joke is not nearly as funny when you know the punchline ahead of time. Even technological advances like artificial intelligence require stepping outside conventional thinking.

So, the real question becomes: when do you want reliability, and when do you want originality? In investing, reliability usually wins. I wouldn’t want a money manager getting “creative” with my savings. Stock picking and other active strategies introduce variability and risk because markets are highly efficient. Attempts to outsmart them often backfire. I’d rather own an index fund, where I know expenses will be lower, diversification broader, and turnover—and therefore taxes—more manageable. Index funds are built and maintained systematically, and that structure reduces the chance of human error or unnecessary tinkering. It’s a simple solution that works.

The trick is recognizing that both systematic and unsystematic approaches have their place. Creativity helps us grow, adapt, and imagine new possibilities. But systems help us stay on track, avoid mistakes, and build long‑term financial stability. While I still don’t know what “hydromatic” means, I’ve learned that a reliable, systematic approach can make long‑term investing run a lot more like Greased Lightning.