What's something you wish you knew your senior year of high school?

Question

What's something you wish you knew your senior year of high school?

Answer 1

I wish I knew how unimportant your social standing in high school was, and how irrelevent it becomes after graduation.

Good question, have a star.  I rarely give those out, btw.

Answer 2

I wish I'd known what appalling memories people have. Had I realised that all my blunders and follies would be so quickly forgotten by everyone else, I would have been far more outgoing and relaxed!