One more thing I might mention here.

Don't feel bad about missing a session. If you get busy or get into good conversations with people, especially MS people, skip a session. It's good to get a break here and there. Don't forget that most sessions are recorded.

Also, if you have questions after a session, follow the speaker outside. Most will be happy to spend 5-10 minutes answering afterwards.

Keep business cards handy. If someone can't answer your question, give them a card. And get one from them.