Have you ever seen the disney movie Nemo? I take my personal motto from that movie. I have HORRIBLE down days too but when I do i just think of the scene where Dory and Marlin are lost in the deepest darkest parts of the ocean and they don't know where to go or how to get there.
Dory: Hey there, Mr. Grumpy Gills. When life gets you down do you wanna know what you've gotta do?
Marlin: No I don't wanna know.
Dory: [singing] Just keep swimming. Just keep swimming. Just keep swimming, swimming, swimming. What do we do? We swim, swim.
Marlin: Dory, no singing.
Dory: [continuing] Ha, ha, ha, ha, ho. I love to swim. When you want to swim you want to swim.
Marlin: Now I'm stuck with that song... Now it's in my head.