I brought my laptop to last Saturday's Slaying Solomon session. This used to be a common practice for me but lately I've been getting by quite well with old-school paper notes. I transitioned to analog mostly because I found that I was over-preparing for my sessions. If I knew I'd have the ability to view word files and spreadsheets and other assorted tools during play then I'd often spend more time generating overly detailed episode plans, write-ups of NPCs, and too-pretty maps.
But I do miss having the power of the Internet at my fingertips. On a whim, I hauled along my work laptop to the game and queued up several pages from the Slaying Solomon website (keeping track of continuity can be a bitch in a 7+ year campaign). I also immediately began using various tools and generators. Besides the Kleimo name generator (essential for games set in modern America), I also quickly realized that I needed a good way to generate awesome arcane tomes. Enter the donjon! There are many excellent generators available to our community (Chaotic Shiny and Seventh Sanctum come to mind), but I stumbled upon the donjon's fantastic tome generator with an "oh shit, I need an evil book" Google search. This and other useful generators can be found on the index page, which is much more comprehensive than the list of tools on the site's sidebar.
Anyway, consider this your "tip for Tuesday".