Wisdom comes from experience, but it doesn't have to be your experience. Take heed of the following adults who took to Reddit to share all the stuff they did as teenagers that they completely regret. After all, "hindsight is 20/20," "youth is wasted on the young," etc, etc.
1. NotBridget will never forget… whatever the hell their name was.
Obsessing over my crush. What a waste of my precious time and energy.
2. SPEAK UP, noodles13.