I think this is a great idea..... go volunteer somewhere, it gives you a great perspective on how many people live their lives, many will sit and tell you how they got where they are, and what they would have done differently..... I've had the same feelings, at least once a week i can picture myself swerving into oncoming traffic, but I don't do cause I like where I'm going, I have seen other people's lives, and learned what mistakes they made and how to avoid them by talking to them.... It's a very liberating thing to help someone that really can't help themselves. You need to go out there and get what you want. you say you want to travel, then do it, nobody can stop you. where there is a will, there IS a way. You will figure out what you want to do when you take the first step in making yourself happy. follow your heart and you'll never go wrong. I know what you mean when you say you want to leave everything behind and hop on a train...... my true dream life revolves around a recent movie called "into the wild"...... it's a great movie (other than the fact that the dude dies at the end, sorry for ruining it for anyone that hasn't seen it.), and my true dream. the movie is about a guy that leaves everything behind, everything, even burns all his money when he ditches his car. he ends up in the middle of the mountains just living off the land in a shelter that he found. needing nothing but what the land gives me is my dream, and one day I will end up doing that, even if it's not until I die, one day it will happen.
so stay strong, your not the only person feeling the way you feel, there are many many others, all going through the same thing, it's the ones that make it out that matter, so make yourself matter. do what makes other people happy, and you wont care about what makes you happy. do what makes you happy, and it wont matter where you are, or whats going on, you''ll be living your dreams.

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my eyes always look like so if you dont like it! NOT GREED PEOPLE!