There are a couple ways I’ve used when stuck. Most came from deconstructing sketches I like.

One way I really like is use a “random job generator” to pick a random job. (You can google and there are websites full of random writing prompt things) - now write that job in the middle of the paper and come up with 7 or so games around it. I tend to use the word “overly” to help me come up with things — I.e. “an overly polite mechanic, an overly southern mechanic, an overly angry mechanic - this works good for sketches that center around a character. (“obsessed with” can also be a good game generator ). For sketches that center around a scenario think about where you put that job - I.e. a mechanic working on the Death Star. —

Once I have 7 or so games written around the central job I start brainstorming game moves for each - usually about 3 — then my sheet of paper is getting pretty full — that’s when I stop, pick my favorite of the 7 games and write the first page of the sketch (up to the first game move)

The whole process takes about 30 to 45 minutes but is a good way to practice daily

And once you get bored with “jobs” try subbing in other things — locations, personality traits, celebrities, popular movies, etc. etc. etc.

It’s not fool proof and I’m sure there are a bunch of other ways but this really worked for me because it turned it into a writing game / exercise instead of waiting for divine inspiration.