I second bookmarking. It's bad that they don't export it on the data export, and you can't scroll down after a certain limit, but at least it's private. And they seem to be planning on adding API support for bookmarks, so in the future we can just export it that way
1. Bookmark instead of liking tweet if info is worth coming back to.
2. Retweet if I totally agree and want to share my view with my followers
3. Add people to different curated lists instead of following them.
Twitter has some excellent feed curation tools but not many people are aware about them.