John Cook, who’ve I’ve mentioned a few times here, has a nice Twitter feed called TeX Tips. Every weekday, he posts a TeX/LaTex tip. Mostly they’re things you’ve probably seen—although some surprised me—but they’re of great value to folks like me who use TeX but not everyday. Even LaTeX has lots of commands that are easy to forget—how do you typeset the Å character, for example—so having a daily reminder of them is useful.
Sometimes he links to a longer post by himself or someone else that covers some useful piece of TeX/LaTeX advice. For example, one post covers the draftwatermark package that allows you to put a watermark, typically DRAFT, on a document. I was wondering how to do that just the other day so it was a good find.
If you use TeX or LaTeX occasionally, Cook’s feed is an excellent and painless way to help you remember the details. It’s one post every week day so you won’t be overwhelmed.