Yeah, it's really empowering when you first come across this stuff.
If you stick with it you'll notice he'll seem in a better mood, or at least more tolerable, without him doing anything at all. It's as if your new understanding, your higher level of energy, is 'picked up' by him on some level.
Also, find a way to get him to do some rigorous exercise. Say you're going to the gym and literally drag him along.
I personally find it physiologically impossible to be in a depressed mood after I've done 30 minutes of intense exercise. The activity, combined with the chemical rush you get, just totally blows depression out of the water.
