What are some legit ways to gain a competitive edge?

Question

Nothing illegal like doping or steroids, just little things. Could be as simple as a peanut butter jelly sandwich or something like creatine phosphate.

Answer 1

set all doubts aside, listen to music, be confident!

Answer 2

when i swam i would always drink gatorade and eat chocolate.....

Answer 3

always using the best equipment

as seen with the swimming and the new suits