Taming the mail
There's a whole rainy afternoon of excitement organising your GMail into folders, subfolders and even subsubfolders using the new Greasemonkey script Folders4GMail. Basically it allows you to organise mails the way you normally organise documents, in a sort of tree structure, something like the structure of a tree.
You need Firefox and Greasemonkey, and if you don't have them both WHY THE DADBURNED HECK NOT!