Every now and then, I open Disk Inventory (OS X only) for a graphical representation of what the big files on my computer are. One of the two biggest are the .msf files that Thunderbird seems to make. Weird because I don't even use Thunderbird! The other worth mentioning is filesystem_blobs.MYD which is an automatically generated file created by Adobe Bridge. Deleting these manually saved me about 15gb.

I just got a copy of the book for $5 recently. Regular price $40? M+B Gallery in LA generally has some pretty funny/cool stuff so hopefully people check out other parts of the gallery's website.