Repeat after me.  "What could have happened, did."

Living in regret isn't living at all.

Was never very good at identifying the beneficial future. Not that all decisions were bad, just a lot of missed opportunities.

UPDATE: Sometimes a so-called missed opportunity may end up being a blessing. When you are young what appears to be the golden opportunity may really be made out of coal. Time will tell if failed opportunities are really failures at all. I don't think they always are, they are more like a re-direction, a chance to re-group and plan. If you think you have failed because of a missed opportunity, don't dwell on it, turn it into a positive experience. Learn from it, but remember many times the future will show the failure was not a failure at all, but a life success story... Sometimes when a door slams in your face two more will open in its place.

Randyman said it well - too many to list, although most of them are rather minor in my case (but the big ones are really big ones!). I have a lot of minor regrets about guns I passed up buying in my younger days, when I was really into collecting - some of them I could have bought for next to nothing, and now command hefty prices. I also egret not having traveled a lot more in my younger days, although I can't complain overall. I'd still like to get to Ireland, Scotland, and France before I kick the bucket.

Too many to list here. Again, I know I'm not alone in this.

There is a part of me that will always be sorry that I did not give up all for my music. I always remained grounded enough to try and keep a traditional job while I was pursuing Music. I never tried to do it full time. (although it did take up 40 hours a week, I know) If I could go back, I think I would. All or nothing....in Entertainment, I think it has to be that way.

This can be a real blast, especially if you missed an opportunity because you were lazy or didn't see it in time. But in life, we live and learn. If one door is closed, then wait until another one is opened. But I always try to take what ever opportunity I get.

Not following through on your dreams