I like to use LLMs to create random tables that I then use to spark my imagination. You can easily get o1 to create a bunch of random tables on a topic. Create multiple columns that you can then mix and match results from - or just roll multiple times on the same column.

I also find the image generation great for getting a "feel" for what a room / location might look like so I can improvise describing it a bit better.

LLMs are _really_ good at finding words that "go well together" - so use it to come up with a bunch of words to describe the atmosphere of a particular location or the mannerisms of a particular NPC.