Blithly deleting pics from Mexico with an airy "oh, I have them all backed up to CD, I can get them back any time I want" -- and then not being able to find the CDs. (I know I still have backups on the DVD-RAMs. I'm not sure if I just never backed up to CD-ROM. Probably not, given the volume of stuff that would have to be backed. So I am not panicing. Any more.)
Things that make me happy:
New tires. Is there anything in this world more wonderful than new tires? Maybe kittens. Only new tires don't whiz on you, or claw. So the tires may beat out kittens by a squidgeon. And I may only say this because my old tires were so bald that the inside was completely smooth with no trace of tread left whatsoever and it is now raining out. Though that really only makes new tires doubly cool.