As I’m coming up on my 21st year for the second time around I can’ t help but  feel nostalgic and reflect. I’ve learned a lot about life from my own experiences and vicariously through friends (at this point it’s a 50/50 split). So here are 19 selfish (or not so selfish) irresponsible lessons  I’d tell my younger sister….if I had one. Actually it’s not really  lessons per se but life wisdom?