In Drummer, when I get too many tabs open from things I haven't looked at in a while, this is what I do.
- I choose Add Bookmark from the Bookmarks menu
- The menu opens with the new bookmark at the top of the list
- If it's the first time I press Return and enter "Tabs I Closed Recently"
- Then I drag the new bookmark under that headline.
- Close the Bookmarks tab.
- Remove the tab I just bookmarked.
- Voila! Clutter Reduced.