Experiences come with age, and it's only as we get older when we realize the things we've done right and wrong. And unfortunately, the most important lessons are learned a little too late. Before we reach that point in our life, we can find out the best rules to live by and start applying them now. Hopefully as a result, we can minimize as much future regret as possible and feel more fulfilled along the way. Here are nine things that are better to learn now rather than later.