Chrome extension that groups tabs together by domainTO USE: Hit Ctrl+Shift+Q (or Command+Shift+Q for Mac). You can change this keybind in the Chrome Extensions Page, all the way down the bottom where it says "Keyboard Shortcuts".
This extension groups your tabs together by domain so that you can still see their titles even if you have 50 tabs or reddit or Hacker News open. Inspired by the Window 7 Aero taskbar (hence the name).