1) did you find the questions to be longer than USMLE world? When I took step 1, I thought the real test questions were longer than UWorld.
2) when did you take a break? after how many sets of questions?
3) are we allowed to bring ear plugs?
4) what snacks did you bring?
5) how did you manage to stay awake the whole time?
1) It will be like it was for Step 1.
The only surprise is that the test has audio questions (as mentioned in the Step 2 orientation material)... so be aware of that... while the UWorld qbank does not.
The free questions that they give you in the orientation material are helpful to do.
2) I took a 10 minute break after 4 sections and then did the other 4 sections. Take a break when you get tired of looking at a computer screen or if your concentration wanes. You can blow through the tutorial (however I would test your headphones during that) to gain extra break time.
3) Call prometric and ask them about bringing ear plugs. They give you those space-age headphones to wear.
4) You should bring healthy food like bananas, almonds, maybe some sweets. I had a good breakfast, ate a banana for lunch, and then ate supper at home.
5) Just do whatever you usually do to survive and stay awake. You don't want to change too many things before the test (like start getting jacked up on coffee if you have never done that before, etc).
Overall, if you chill out and relax, the day will go better than if you do not over-analyze things.