The top 10 efficiency hacks to help you save 5 hours a week. 2 reason why efficiency is important and the difference of efficiency and productivity. What will you do with an extra 5 hours a week? Include the Eisenhower Matrix, online grocery hacks, amazon hacks, the five minute pick up, Blinkist, Will do vs Could do, and meeting hacks. The feature hack is the Google Chrome Browser Bookmark hack.