9to5 Mac recently had a nice post with some Apple Watch tips. For me, the winner is nightstand mode. It's not as well known as it should be but if you put your Apple Watch on its side on your night stand and connect the charging cable, the watch turns into a handy night stand. I've never liked bed stand clocks that light up the room at night and the Apple Watch kindly turns itself off. If you need to check the time, just touch the screen and it lights up for you long enough to tell the time and then goes dark again so you can go back to sleep. I also prefer the alarm sounds of the Apple Watch over the iPhone.