I exported my Claude data to poke around with it and found out I've become a HEAVY user of Claude Artifacts - the feature that lets Claude build a full interactive HTML+JavaScript tool for you based on your prompts. I built 14 (somewhat) useful things with it in just the past week!
Here's a post describing them all https://simonwillison.net/2024/Oct/21/claude-artifacts/
Full list of artifacts from the past week