Lots of good advice so far. The one thing I'd emphasize is if you haven't
already started investing (financially) for the future, do so. Pour as much money in as
you can, especially into a house if you don't already have one.
Other things;
look to the future, not past mistakes
learn from others mistakes
avoid people that take advantage of you but pretend to be friends
do things that make YOU happy, pinball being one
And finally; Life is like a roll of toilet paper,
the closer you get to the end the faster it goes.
Good Luck! BTW, I'm well over twice your age.