hey man, not to be mean or any other thing, take a break, small, big, just take a break
I never use too much my imagination, or I get tired and will not like doing a certain thing in my head anymore
So take a rest, take some time, like me, i post a part of my event once in a decade, and im completly fine
If you dont want to do that, then eat sugar, it helps brain activity; no sugar = no capability of thinking