14. Sleep
Getting adequate sleep is important for recovery from training and especially important for recovery from injury. Sleep is when the body produces the most of its anabolic (muscle and tissue building) hormones, such as testosterone and growth hormone. This then puts you in a deep state of repair and helps to send more blood and nutrients to the affected area. Of course, during sleep, you are also fully rested: taking the weight off the area and releasing any tension. Finally, sleep allows the body to redirect energy from some other low-level tasks and direct that to the immune system and repair of the tissue.
When you get adequate sleep this can lead to huge differences in your recovery. Try to keep your room as dark as possible, manage the temperature (cooler is better), drink plenty of water before bed, and avoid any blue light or stimulating activities if possible.