Dear Future Me

When I taught juniors, I always had them write a letter to their future self, and put it in an addressed envelope.  I never read the letters, but held onto them for three years.  After three years, I dropped them in the mail.  Naturally, they had long forgotten about the letter and some would notify me after their's arrived and they were into post-high school life.  It was always interesting to learn of their reaction!    

Well, fast forward and here is a modern take on this practice (give it a shot!): 

Dear Future Me