Get through life without bothering anyone, keep my head down, stay out of the way. Attempt to be useful/helpful if at all possible. Not especially concerned about what happens to me personally.
That's about it, I guess. I'm not a very ambitious person. Partly, I feel a bit silly planning ahead in terms of what to do with my life since I'm only going to live till about 40-ish tops, and quite possibly a good deal less. So yes, try to help people out and not be too irritating. Thus far, I'm even having trouble with that much, which doesn't say a whole lot for me.