Ever hear the advice ‘Be yourself’? Don’t take it. Yourself sucks. Instead, think of who you can be, and think of who you want to be, find the intersection, and be that guy. Don’t be yourself; make yourself.
Ever hear the advice ‘Follow your heart’? Don’t take it. Your ‘heart’ has no interest in your long term happiness, only in short-term satiation. It will do a fine job of regretting past mistakes for you, but it won’t do a damned thing to help you avoid future mistakes. Don’t follow your heart. Lead it. Decide where it should go, and guide it in that direction.