Well, yeah, it's like that for everybody. I mean, from time to time, you tend to make mistakes-- no matter what age and you may even regret it afterwards. You either learn from your own mistakes or learn from other people's mistakes. There are always speed bumps along the road. From all the things you come across, gets you more experience and gets you one step closer to finding yourself.
For me, I learned to not to be so trusting of others by the time I was 10 years old. I know that it's true by what the say about Karma: "what goes around, comes around". And I learned to be more careful of my actions or decisions because of the consequences that I faced. For example: Let's say you've stolen somebody's wallet before just to get some more money to buy an ipod or something. It may take days, weeks, months or even just a couple of years for something like that to happen to you. There's no avoiding that becuase you don't expect that to happen to you. Am I even making my point across?? Of course my opinion may not be exactly like everyone elses...
Anyway, it's true when they say, "What doesn't kill you, makes you stronger." I just answered this Featured Question, you can answer it too!