These are some chrome extensions, i like to use,
1. Turn off the lights : The entire page will be fading to dark, so you can watch video as if you are in the cinema 2. Feedly : Feedly organizes your favorite sources into a magazine-like start page. Powered by Google Reader and Twitter. 3. Workspace : Automatically remember your current tabs and windows like a workspace, and let you restore them later. You can check other Chrome Extension from here. You can activate Chrome Task Manager by pressing Shift + ESC.