When the brain isn't functioning, Relax. Sleep. Play. Pray.
However, for Steemit sake, keep a pencil and paper within reach. Then, when your brain randomly spits out a good idea, write it down.
I maintain a "Steemit Tickler File." (Click below to see an example...)
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Nice, might use the steemit ticker file! Right now, I jog my thoughts down in a mind map :)