How do you come up with ideas?

Genuine question pop off in the comments pls 

I get such bad art block and have a hard time coming up with ideas, like are they supposed to just Come to you or do you do things and piece stuff together, I feel like I've been artpilled by big Art in terms of idea of the savant artist who has visions of great art and must put pen to paper...idk what i'm doing i'm just here.