I think it really depends on the time of year and weather. Early season when I am hunting specific feeding patterns, I try to give a stand at least 3 or days between hunts, even if I did not kill anything. However, if it was raining, washing my scent away, I may hunt that stand earlier. This time of year, when patterns are being throw off due to the rut and chasing activity, I may hunt a stand back-to-back days. In fact, I have killed a deer from a stand on a evening hunt, only to hunt it again the next morning and kill another.