Just wanted to quickly point out a very cool poster-sized graphic available with lots of tips on optimizing for universal search. You can download it here: Internet Marketing 2009: Universal Search Optimization Chart
Some of SEO's heavy-hitters contributed tips for this poster, and it's got some great info on it. It's actually big enough that it could be printed out on poster size paper and used to decorate your office wall with! (I might even do that next time I'm in a town big enough to have a FedEx Kinko's store available). Below is a miniaturized version of it. Enjoy!