Yes - pre register for all the break-out sessions prior to arrival, this will guarntee a spot within the session. If you aren't registered for a particular session, you will have to stand in the non-registered line. Sometimes, these can be no problem, other times they can be around the block.
Labs especially - the good labs will fill up extremely fast, so make sure you register for all you can.... it's nearly impossible to get into a lab and be on a PC if you aren't registered for that particular lab.
Also - if you're in a session, and you don't like it - or think it's not for you - just leave - head out and find another one that is at the same time - - with so many sessions, you're bound to find something that interests you.
