Never let your past mistakes and experiences prevent you from taking on new challenges or opportunities. Most of us have had jobs that wound up being a bad fit, not to mention been in at least one relationship that ended badly. But you should never let the fear of going through another bad experience keep you from taking on a promising job or starting a new relationship that has the makings of a fruitful union. After all, it's experience that teaches us what we did wrong so that it won't happen again in the future. Next time a seemingly great job opportunity or dating prospect comes into the picture, we should be better equipped to determine whether either is right for us, given the lesson we learned the first time. Thus, experience should serve to facilitate growth and progress in our lives, not inhibit it.  I realize it can feel like a big gamble to take the plunge once more after being left hurt or disillusioned the last time. But integral to the human experience i...