Gotta keep the brain cells from leaking out.

Gotta keep the customer satisfied.
Gotta keep the employed unfulfilled.
Gotta keep at the bottom of the barrel to scrape your way to the top.
Gotta keep the ladder rickety so no one's sure when they're coming down, but they will.
Gotta keep a living will so everyone knows who gets your stuff when you croak.
Gotta keep the frogs on their lily pads so nature knows its place.
Gotta keep the coffee down.
Gotta keep oxygen consumption up.
Gotta keep the trees out of the woods.
Gotta keep the trees from knowing the forest from itself.
Gotta keep on keeping on.
Gotta keep the hangman twisting in the wind.
Gotta keep the Great Lakes full of sand.
Gotta keep the Panama Canal in its proper place.
Gotta keep the bow tie in my collar.
Gotta keep the bow tow in my shoes.
Gotta keep the purse strings nice and loose.
Gotta keep the player piano playing itself for a fool.
Gotta keep the monkeys swinging on the vine.
Gotta keep the operater waiting on the line.
Gotta keep the soulless journey to JC Penneys.
Gotta keep my spelling in check.
Gotta keep the dynamite off my back.
Gotta keep the sweat in a jar properly labelled next to my feces.
Gotta keep the doors shut and the windows swinging.
Gotta keep the inside from getting out too much.
Gotta keep the human liver punished for things it didn't do.
Gotta keep the train on the tracks.
Gotta keep my hair shining with the proper luster and bounce.
Gotta keep the fan club tracking the wind.
Gotta keep my toe nails split lickety.
Gotta keep the dictionary abridged.
Gotta keep the burning bridges flaming.
Gotta rise for the National Anthem.