I good leather belt.

Yourself. Time and resources you invest in yourself usually grant the highest returns in the long run.

Examples:

1. When job hunting, prefer opportunities that give you more valuable experience when possible.
2. While planning your schedule, give highest priority to activities that contribute to your physical and mental health.
3. At the grocery store, choose fresh ingredients over the cheaper and easier premade options.
4. When budgeting finances, pay yourself first by setting aside what you can for your future. If not yet possible, see 5.
5. Invest in your continued education, which can include traditional credentialing such as degrees or certifications, but also online and night classes, or even self-guided study.
6. Choose relationships and experiences over things. While things can temporarily improve lifestyle, relationships and experiences permanently expand the life you have lived.

There’s the adage, “spend your money where you spend your time.”

If you’re going to spend a lot of time in front of a TV, get a nice one. Cook a lot? Get the good knives and pans. Don’t read much? Don’t buy an e-reader or book subscription service. Not big into DIY? Get cheap drill/driver for the rare times you need it.

There’s plenty of exceptions but it’s a nice general rule.