I have two ways I cheer myself up: for one, I have a whole section in my YouTube account dedicated to comedy…everything from laughing babies to tv bloopers to goofballs doing boneheaded things around someone with a camera 
The other one is also music… putting on “feel good” stuff. For me, oldies work a lot, and some good old 80’s rock too.
Steve Winwood’s “Roll With It Baby” could not sum up my ADD life any better 