Learn how to break down a problem when you're stuck.

When I was ~10, I tried to get my TRS-80 (yikes I'm old) to display something like the star wars death star on its primitive graphics. I got pretty far, thanks to the trig examples in the manual. But I was flummoxed that my degree measurements yielded crazy sin/cos results. I felt crushed. Some years later I learned about radians. I often think back how my life trajectory might have been different had I known something simple: how to break problems down.