Napping during the day is one way to make up for lack of sleep. It s much better than stimulants like caffeine because it gives the body what it needs and is nonaddictive.
Meditation also helps.
Monks who spend hours each day meditating and chanting get only a few hours of sleep yet engage in hard physical work. When one monastery in France eliminated chanting from their discipline, the monks became fatigued. When it was restored, so was their strength. The meditation technique presented here can help, not only with recharging the body, but with improving mental clarity and emotional balance, and becoming more spiritual as well. Since meditation is a mental technique, an understanding of the mind is helpful in learning how to meditate.