In my most recent post, I stressed the importance of taking a few moments every once in a while to mentally transport yourself back to a memorable time in your life -- whether it's your days in college or the first months into your relationship -- via pictures or music. Doing so stirs up positive feelings, especially if, for whatever reason, you want to mentally escape from the present. Another observation I've made is that our fondest memories seem to involve starting or ending something. This makes complete sense, as we often commemorate beginnings and endings: When babies are born (the start of life) Paying respects to someone who has passed (end of life) Starting grade school Leaving grade school  Starting college  Leaving college to enter the real world Starting a new relationship Marriage Your first sexual experience (losing your virginity) Your first kiss  Your first date Starting a job (especially your first one) Resigning and leaving a company af...