According to recent story in www.Scienceandreligiontoday.com, depleted will power can be restored through sleep and eating.  Rested people demonstrate more will power than tired people.  In fact, will power proves to be highest in the morning and lowest in the evening.  Self-control evaporates as the day goes by and while people have been active.  And since exerting will power takes energy – as shown by studies that show a marked decrease in blood sugar levels when resisting some temptation – eating fuels the ability to replenish “used” will power.  All this helps explain why Rosh Hashanah includes large, festive meals as well as a welcome nap.  If the New Year demands we exert our will power and overcome the temptations that lure us away from doing what is good, then we need the mechanisms to boost our will power.