My mottoes are: No regrets and Take Risks. I think they go hand in hand.
By taking risks, I feel like I don't sit around and wonder "What if...." What if I did this differently? Or what if I didn't do that, say that? or What if I did say this? However, if I don't do something, I just have to tell myself that I made a choice, a decision. Then not think about it again. Its done!
However, does that mean that I always follow those, nope! Sometimes I don't take risks and sometimes I regret not taking a risk.
So anyway, no regrets and take risks! Life is just too short for anything else!