For Chrome I like to use the "Bookmark all tabs" option (Ctrl-Shift-D). When I am in the middle of researching a topic but want to shift gears, I save bookmark

For Chrome I like to use the "Bookmark all tabs" option (Ctrl-Shift-D). When I am in the middle of researching a topic but want to shift gears, I save bookmarks to a new subfolder in my "Working Tabs" folder. Then I delete all tabs. That way (1) I know I can restore to this state if I need to, (2) I keep separate trains of thought from getting muddled, and (3) I can keep a relatively Zen workspace.