“How do I prepare for anesthesia?”

Try to sleep well night before. Do not eat food. Do not drink anything since midnight before. Do not smoke or drink for 48 hours before. Take your prescribed medications. You can take a shower and wash your mouth the morning of surgery. Be in comfortable clothes, and request a family or friend be with you.
Good luck.

Simple things. Take any usual medications, follow no food or drink guidelines, bathe as instructed, ask any questions if needed.

If you are an otherwise healthy 38 year old male, the most important thing is to remain NPO (That is, don't eat anything) for 8 hours prior to your procedure.  If you are taking medications, you should be told which medications you are allowed to take on the day of your surgery.  Be sure to let the anesthesiologist know if you are taking any over-the-counter supplements.  Otherwise, just relax.