It's one thing to use that that whiteboard and marker you recently bought, but I even advised a student today to simulate the actual conditions a step further.
Remember, there are certain movements and gestures that are not allowed on the Online GMAT.
Are you someone who mutters when reading? Are you someone who puts a hand over their mouth while thinking? Do you perhaps move your eyes to the side or upwards/downwards when trying to remember something? Be careful! And try to get into the habit of behaving as you are supposed according to the rules so it's second nature to act that way during the actual 3 hour exam.
Also, athough it may sound a little odd, consider even wearing the same type of clothing you would during the exam (forget those uncomfortable levis!); giving it at the exact same time of the day (that is most optimum for you and the one you have scheduled your test for); and being more uniform with your routine leading up to the exam (leave the late night movie for later!).
All the best
Ducks in the park today! -
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