I’ve had success with:

• dumping email threads into it to generate user stories,
• generating requirements documentation templates so that everyone has to fill out the exact details needed to make the project a success
• generating quick one-off scripts
• suggesting a consistent way to refactor a block of code (I’m not crazy enough to let it actually do all the refactoring)
• summarize the work done for a slide deck and generate appropriate infographics

Essentially, all the stuff that I’d need to review anyway, but use of AI means that actually generating the content can be done in a consistent manner that I don’t have to think about. I don’t let it create anything, just transform things in blocks that I can quickly review for correctness and appropriateness. Kind of like getting a junior programmer to do something for me.