I don't know if this would be useful to anyone else, but sometimes I like to just leave my player running, for a couple reasons: Sometimes it helps me sleep to have certain music playing; sometimes I like to leave it going when I leave the house, to make it seem like someone's home; and sometimes I like to have it going in a room that I'm only in part of the time.
For these reasons, I'd like to temporarily suspend 'last played' and play count. Maybe there's already a way to do it with a hotkey and perl command, I don't know. But when I use weighted random, it usually pushes recently and often played songs to the bottom, including songs that played when I wasn't around.