If you did the list of 100 unrelated words last week, find it now. (If you didn’t, do the exercise: write 100 words, each of them as unrelated as possible to the word preceding it.)
Trawl your list and choose pairs of words that make an appealing combination. Generally, take words that happen to be adjacent to each other, you but you can break the rule and matchmake too. Then, for each word pair, write yourself a short assignment that centers around the image or impulse the word pair gives you. Take it literally, be simple-minded about it. For example, I have beetle/aflame as one of my pairs, so I might assign myself to write a scene in which someone comes across a flaming beetle, or a scene in which a specimen drawer of beetles catches on fire, or perhaps a scene involving the ritual of the flaming beetle, whatever that is. Write yourself at least five assignments. Then choose one and fulfill it.