What life lesson do you wish you'd learned earlier?

Let's see there are so many things that I have learned over the last few years, that I just don't know where to start.  Even though your parents try to warn you about some things, sometimes you just have to learn on your own the hard way.  For one I wish I had gone ahead and gotten myself established financial before I got married and had kids.  It is much easier to take care of a family and home when there is enough income that will allow you to do so.  I wish I had not destroyed my credit at such an early age, because I would not be struggling to pay for college right now.  Oh yeah, I wish I had gone ahead and finished college 6 years ago before I got married and had kids because going to school would not have been as stressful then.  But anyway there is no point in dwelling on the past; learn from you mistakes and don't just try to do better, but do better.  Because there is one thing about life, as you live it you become wiser (hopefully) and you learn from the past and grow mentally and spiritaully.