One of the first things that I do when I get home from work everyday is to go and charge my phone if it's anything less than 70%. I've got a wireless charger, so anytime I'm not using my phone I put it on there, so that pretty much anytime I'm at home, my phone is always at 90%+ battery. The only time I charge my phone overnight is if I see it drop below 60%, and I know I've got to go to work first thing in the morning.
I'm always so on top of charging my phone, that in the year and a half I've had it, I've probably let it drop below 20% only once or twice.