Do you ever have bananas get too ripe on you and wonder what to do with them? Sometimes I'll make banana bread with them if I've got the time. But, I don't usually have the time. I had heard that you can freeze them and then use them for smoothies or what-not. So, I tried it. I found out that you just can't peel a frozen banana. Light bulb moment! Peel them first.
Stick those peeled nanners in a bag and throw 'em in the freezer and they'll be ready for you when you want to make those smoothies. I suspect you could even use 'em for banana bread. No peeling' required.