The Zeo is a little headband that you wear that measures your brain waves, and then tells you, in a non-judgemental way, how you slept the night before.  I’ve mapped a few common night events to where they go on that scale.  I don’t actually know how accurate the thing is, and it’s pretty expensive.  There’s one that’s been making the rounds in our circle of friends, and now it’s our turn.  The adjustable strap is capable of expanding to my ridiculously huge head, so that’s pretty nice.  Fun fact: when I was adding the ‘REM’ section on the scale for this comic, an REM song happened to start playing on shuffle.