A couple months ago I posted a letter to my younger self, to which many of you responded with letters to your own younger selves in the comment section. Turns out, we had a lot to say to our mini-me’s — from dating advice to style tips, we’ve learned a lot since the days we donned jelly shoes and spent weekends cruising the mall (or should I say we’ve learned a lot since the first time we donned jelly shoes and spent weekends cruising the mall?). I combed through the letters to our younger selves for the best lessons learned and wisdom gained. After the jump, 15 tips for the young women behind us.