Well some put a lot of energy into their hair once a week where they have a style that they can leave in all week. The next option is to stretch the hair with a twists, braids, or banding; then take them out (if taken care of properly this style can last for a few days with a lil fluffing in the morning); lastly, there's the wash'n'go (use pins or headbands for a 'tame' look).