I have two problems:
1) I only buy new stuff once a year (if that). Sadly, I haven't found any good coin stores in the Washington D.C. area - surprising given the history and the money (in all uses of the word) here. Moreover, when the Baltimore Coin Show is going on, I seem to always be busy that one weekend - even when I plan on going!!
2) When I do buy something, I forget to document it for this site. I intend to, but never get around to it.