Last week, Buzzfeed asked its readers to write a letter to themselves in five years. I have a long history of doing stuff like this. When my family had a New Year's Eve party with friends in 1999, I asked everyone -- ranging in age at that point from 5 to 75 -- to write a letter (on paper) to themselves in 10 years.The next day, after we'd all survived the big Y2K scare, I saved the letters and returned them to their authors in December 2009. And several times, as I've pondered big personal or professional decisions, I've used FutureMe to write myself a letter that the site will email me a few months or a year or so down the road. It's always a fascinating exercise.