Hi! Not trying to go against the grain here, but my doc told me every other day is the best way to go. Apparently, sperm can live up to 3 days in the woman's body, so the thinking is to refresh every other day to make sure the little guys are there when the egg makes her appearance. Apparently, the cervical mucus helps move them up to the egg, and the seminal fluid helps to keep the sperm alive and well-fed while they're waiting (once they reach their destination)!
Also, don't know if it's true, but I heard that if you do it every day the man may not make enough--he needs that extra day to sufficiently "recharge" his supply. I would say that if your doc is telling you every other day, then follow his/her advice. Good luck and baby dust to all!