Listen and follow your surgeon's instructions. It may sound trivial but it's really important that you listen to it. Avoid smoking 2 or 3 weeks before the surgery, stay away from alcoholic stuff and ask your surgeon what are the medications that you need to stop taking before the surgery. Following this instruction will help you during your recuperation period. Trust me, it will really help.
In the day of surgery, you should arrange for someone to drive for you after the surgery. You will be slightly groggy around this time, so make sure that you avoid doing things by yourself. Having someone around to assist you will protect you from encountering any minor accidents that could cause damage to your nose.
Wishing all the best on your surgery