What was the worst advice you ever received? Did you follow it?
When I was a kid the adage "If you are going to do something, do it right" was drilled into me.
I translated that as "Never do anything you can't do well."
I followed it for years - never starting anything if I didn't think I could do it "right". Generally that meant that I didn't do anything I hadn't shown an aptitude for. It hobbled me, built some whopping insecurities and generally made for a sucky existance.
Now I still think it's important to do things well, but it doesn't always have to be right. Because, what is "right" anyway?
Do it. Try it. Do your best. If you screw up, try again. Or not. Learn from your mistakes. What can it hurt?
Now I'll pretty much try anything I think will be fun or interesting or will teach me something about myself or the world around me. (See painting to right).
It's a much better way to live.