For the next 24 hours:
Avoid exercise, sex, swimming, tanning, saunas, or really anything that could possibly bring bacteria into the area you just got waxed. Not doing this can result in irritation or ingrown hairs. Keeping the area clean for 24 hours after a wax is key. When you shower the first 2-3 days after getting waxed, just use your hands and your body wash. Skip the loofah for a few days.
Exfoliating and moisturizing are important to preventing ingrown hairs. You should be exfoliating 2-3x a week and moisturizing the waxed area daily! My favorite exfoliating tool is a dry brush, & a paraben & sulfate free body oil or lotion.