I knew most of these, but #4 is good to know for sure.

Eight Microsoft Word Shortcuts You May Not Know

Do I need this? What would my theme song be?

Build a System That Automatically Plays Your Own Theme Song When You Walk Into a Room

Build a Trip Wire Alarm From Parts You Have in the House

I want this.

Google Wifi offers modular, customizable home networking

Check out this epic, expertly executed $77k Indiegogo backer troll