It may take them a bit to get you checked in - don't take a full 10 minutes. Do take all of your breaks though. I used the restrooms and ate a granola bar and still had plenty of time.
Also, don't say yes that you want to take a break when you get to that point. Raise your hand for them to come get you and then when they get there, say yes. They did not tell me this, but I had read it on here. Sometimes they don't come for a few minutes and you don't want to be out that time.