Or, put a charger by your bed, in your car, and at work. Plug-in whenever you're near one.
Seriously, that's 2 extra chargers to buy and you shouldn't have any trouble. People say "oh, that's hard." Ok, well I leave everything turned on all the time, ENJOY my phone, and never worry about battery. Who wouldn't want that?
(Yes, I follow these battery-saving rules when I'm going to be outside ALL day long, but that's, like, 1 day every 2 weeks. Why punish myself the rest of the time?)