Looks like Thomas the Tank Engine had the right idea all along. "I think I can" may be the best way to mentally achieve world domination.
According to ASAP Science, each thought we have can actually change the structure and function of our brains. And, no, they don't mean metaphorically; they literally mean thinking that you can do something and being positive about it will alter your brain.
Eventually the power of your thoughts could help you, for example, learn the piano or even increase muscle mass in your body.
Cancel the gym membership now.
And the next time you forget to write that midterm paper just let your professor know you've thought it all up in your noggin — it's pretty much the same.