For the most part I stopped collecting a few years ago, and resolved instead to put together and play with what I already have. I'm the type that would rather have one nice example of a particular model, than 10 tatty ones. All of my stuff is neatly organized within one closet. I'll cycle a few machines out at a time, so I don't have it strewn all over the house anymore. If something makes its way to the kitchen table, I try to have the project wrapped up within a few days (I'd like to keep my family around, heh :-))
In the garage there's an organized stash of random parts, motherboards, cases, etc, which I keep around for spares. I also bought spares of most of the Zorro cards and other things I used to use regularly... not so much from a hoarding drive, but to have an extra in case something I really enjoy using breaks.
Nowadays I don't have as much time to tinker, and I'd rather sit down and play a few games of Arcade Pool than scout ebay or hunt around for more doo-dads. :-) Only things that continue to elude my grasp are the Delfina Plus and DKB 2060... but I'm happy enough without them for now :-P