Whenever you need to pick something up from the floor, bend over on one foot. In the beginning, support yourself by holding onto something nearby until you get your balance and strength. You should also switch the leg you stand on each time you go to pick something up. Over time, and especially if you do a lot of picking-up, the neuromuscular efficiency in your legs and core will improve. Furthermore, there is another bonus in that this technique reduces strain to the lower back.