I love this idea from http://ourpeacecorpsadventure.blogspot.com/2011/03/meaning-of-word-farewell.html
“They made me the BEST going-away present. Each of them wrote cards, sealed them up, and labeled them when I could open them – birthday, anniversary, friendship, get well (!), that kind of idea. “
I think I am going to do this for myself as well. Write letters to myself, seal them, and mark when I can read them – like random dates or specific moments. I think it is such a great idea to ask your friends to write you letters, or notes, or cards.