The other day at work I learned that you can remove backgrounds from images in Word 2010. What takes 10-20 minutes to do cleanly in GIMP takes 10 seconds in Word: insert picture, click "Remove Background" under "Picture Tools", and you're done (provided the image isn't too detailed). Insert a new background image, click "send to back", and you've got a new setting. Mind blown at the simplicity of a utility that's been there all along. Here's Peter from The Snowy Day and Whistle for Willie in new landscapes.
I know many feel TED talk fatigue, & I can be one of them. But if you're interested in the sharing economy, or art, or Twitter, or bringing humanness to a busy impersonal place or interaction, or even just or maybe especially *how to present a short talk well*, I recommend Amanda Palmer's 13-minute talk (2013):