If you live each day as if it were your last, some day, most certainly, you will be right.
I don't really like leading with my main point today, but it just seems right. I find that some of the worst questions I've ever asked myself started with "What if I had..."
Don't think back to any time you've ever asked yourself that question. You'll only be reinforcing negativity. I want you to think of everything you've ever wanted to do in your life. Now decide to do it all. Take a step in every direction. All day. You've got 24 hours to have the best day ever. Even less if you sleep at all.