I use Sidebery. It's a tree-style-tab manager. Of course, it doesn't help with stopping rabbit holes, but it allows me to return later and see my "path of explo

I use Sidebery. It's a tree-style-tab manager. Of course, it doesn't help with stopping rabbit holes, but it allows me to return later and see my "path of exploration" - which tabs correspond to which subtopics. Another thing I do, which can help with stopping rabbit holes, is to take notes. Even just an ephemeral document. It helps with future memory call, you can use it if you need to jog your memory later, and most importantly you'll get tired of taking notes at some point. That should push you to get "back on topic". I'm not sure rabbit holes are all that bad though, because some of my best ideas have resulted from following them. It's good in moderation.