@DezCorps:Hi. TechEd is exciting but can be overwhelming for first timers especially if they are not used to a large venue setting and thousands of people in one location. However, the logistics and planning by the TechEd team makes it all seamless and everything works like a charm. So, just imagine everything being big. Large convention center, large conference rooms, large projector screens, large expo hall, large dining area, etc.
In terms for signing up to sessions, the session list will be available starting early March. When you build your schedule, you are not booking a spot for that session but helping yourself organize in terms of which ones you want to attend. This also gives the TechEd planning team to adjust room sizes in case there is more interest in particular sessions. As @KevinMet has said, it's first come first serve basis. Generally, every one double or triple books sessions for a give time frame, then weed them out as they go along depending on recommendation from other attendees, etc. You will have enough time to get from one session to another despite the distance of their respective locations within the conference center. Make sure you wear comfortable shoes and break them in before you get there as you'll be doing some walking. If you are interested in attending Mark Russinovich's sessions, you better get there early as they fill up fast.
Do you know anyone who will be attending TechEd Houston? Try to connect with people in advance instead of in Houston, although you'll have plenty of opportunities to hook up with people there. To do this in advance, make some connections in the TechEd forums here, follow the #msteched hashtag on Twitter, follow the official TechEd Twitter handle @TechEd_Na, follow me @Hoorge as I post a lot on TechEd, also follow Scott Ladewig @Ladewig who shares quite a bit on TechEd and is a great resource for information. There are others as well, but this will get you started. Also, Like the official TechEd Facebook page https://www.facebook.com/teched where information is frequently provided. Lastly, if you haven't heard of TheKrewe which is a group consisting of some influential IT geeks who share a passion of Microsoft technologies, technology in general, and loves to have fun, I'll fill you in on that.
While TechEd is a great convention for training, learning, and good technical info, networking is a huge part of it too. You'll make some great friends, meet some experts, and hang out with some influencers. Join the evening social events to connect with people. They are a lot of fun and not to be missed. Those who attend sessions and then retire to their hotel rooms have a very different experience than those who attend sessions, network, and hang out.
Let me know if you have some specific question and I will do my best to provide some answers. I'm sure others will chime in as well. I'm glad you're attending TechEd. Oh ya, despite the negativity and reservations some folks have about Houston, it's actually a great location for the TechEd conference. I was invited to join the TechEd team in Houston back in December 2013 for a Round Table discussion where I was able to see the BTS planning, talk directly with the TechEd planning team, scout out some locations, and check out the city a little bit. Houston has a lot of character and a lot to offer. You'll enjoy it. Cheers.