the best way to minimize future regret is to make deliberate life decisions. look at all the factors, consider options and consequences.
for example i wish i had gotten married and have children earlier.
however, looking back, i see no way i could have achieved this. there is no choice i made that i could have changed, given what i knew then, and even given what i know now.
sure there were opportunities that i missed. like this one girl that showed interest in me, that i didn't pursue.
would my life have been different if i had chosen her? absolutely. would it have been better? i have no idea. so how can i regret a decision, where i can't even assess the outcome if i had made a different choice?
the only thing to really regret are dumb decisions. the ones where you already know ahead of time that they would be dumb. like drunk driving, or stuff like that.
but most regrets, if you think them through, should turn out to be things that you probably could not have made better anyways.