My dad suffers from altitude sickness very badly. He takes some pills he gets from the doc but I do not know what they are. He says they work. Getting onto the best shape possible is a great idea. However, just know that at that elevation you will suffer. I live at 5300' and still need to rest and catch my breath at 10000'. Listen to your body and take the rest you need. Drink lots of water and take a nap if need. Good luck.