I totally get what you are saying.
I'll play one of the Assignors. Assigners?
This is old school stuff, which you might have already been through, but you can adapt the underlying idea re go-to-it-sans-dithering to almost any subject matter. I think it can help re abstraction, play, figuration, choice making, lots of stuff.
I can imagine opposite assignments, as in take this and do studies..
Choose 1 of the following:
A) Place sheet on floor. Empty trash can onto sheet. Paint/sketch that in, ah, 15 minutes.
B) Place sheet on lawn. Strew branches and yard objects onto sheet. Paint/sketch that in 20 minutes.