Free group messaging. It's like a private chat room for your small group. Have as many as you want, and it's always free. Now, you can coordinate with coworkers, organize a game night, and keep in touch with family all in the same place.
Contrary to what you might think (or have been told), leaving your phone or laptop plugged in all the time is not bad for its battery. That's because your gadgets, the batteries in them, and the chargers you attach them to are actually pretty smart about the way they do business.
Only charge fast when you need to. A lot of newer phones support some sort of fast charging feature. These suckers will let you juice your phone up from zero to around half-full in just about a half hour. It's a life-saver for when you've only got a few minutes to spare, but it's also not great for you battery. Surprise!