Go Fucking Work - Website blocker so you can get back to your fucking work
Product School - The global leader in product management training
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
know/how Product Managers - A weekly newsletter with 5 practical tweet-length PM tips
Block Facebook - Chrome Extension that protects your privacy by blocking FB
Better Product Manager - Experience the life of a PM through these tests