I've been cleaning out my keepsakes. I didn't realize how much stuff I considered significant enough to keep. I also didn't realize how easy it is to get caught up in all the 'what ifs' those keepsakes bring.
Moral of the story: Reminiscing should only be done when you've completely and totally accepted your present as it is. Which is hardly ever... going back in time is a dangerous undertaking, hence my pseudo-zen attitude of "now is all that matters".