Keeping track

TiddlyWiki - Wiki in a single .html file that stores info into itself and runs on basically anything. It uses a very nice Web2.0'ish interface. I replaced my remaining text files with a TiddlyWiki today.

Worth mentioning twice, Freemind - Great mind-mapping software. I use it for keeping track of projects, classes, assignments, todos...

On the web
As for web resources, I'd say gmail got email just right. Used it for years and never felt like switching to anything else. I also use the google calendar, reader and of course blogger.

As for self-improvement I've been trying Joe's goals for a little while.

Books...

Books... seems there is no end to the books you absolutely need to read when you're attempting to be a decent developer. In my random browsing trough the web I stumbled upon "Five more books for developers" which is not a list of computer books as you might expect, instead it's a list of books that a developer might want to read anyway. I really like the neat twist at the end of the blog post. I'd recommend any sci-fi addict to read Peter F Hamilton's works (especially the Commonwealth Saga (2002-2005)).