Some starting points:

- Find old datasets (hn.algolia.com "datasets", use huggingface, search arxiv)

- Use weird search engines, e.g. exa.ai (searches based on embeddings vs. google's pagerank/keywords) + google dorks. weird input = weird output

- mix 2 ideas you see - look at showcase channels on discord and pages on random frameworks, things people are building at Buildspace

- Find old facebook groups with lots of grumpy members posting regularly

These are just random strategies I use before I make things I post on twitter (https://twitter.com/joshelgar), but they work pretty well for coming up with fun projects.