For the last couple of days I've been working on thing for +Mythoard. I was checking out the materials on my desk. I would have taken a picture, but I forgot and now I'm at work. The first thing I wanted to use was the 1st edition DMG. To me, it is the mother of all gaming books. If I need a random bit of information or spark of inspiration I know I can find it within those pages. So the DMG is first and foremost.
The second most prominent thing on my desk is a small random table I made for adventure development. It provides a very simple spark to get my creative juices going. I'm not a huge fan of a third of the room will be empty. While it may not have a creature running around inside you can have some details. Even if its just a small detail that advances the story/theme of the dungeon.
On my computer on my right hand screen I have Chaotic Shiny's Treasure Horde Generator. It provides a lot of details that I pick and chose from. I love it. It helps provide interesting properties to an item beyond the +1 this or that.
Lastly, my dice. I don't roll no stink'n electronic, computerize bulllllshit dice. I roll the real plastic man. I have d10, percentage dice, d12 and a d4. They each have a specific purpose. It's strange to how these things can create pretty much anything.