I know many of us are already there, but for those people who haven't dipped their toes into the waters of Twitter yet, give it a try. Sign-up, grab a mobile app, and get familiar with it for TechEd. Being tied in is useful during the conference because a lot of information is communicated during the event over Twitter. It doesn't mean you won't hear about it via other means, but Twitter is where it hits first. Follow hashtags like #msteched, #techedfun, and #thekrewe (if you're so inclined) to keep up.