2. You can use your smartphone as a remote for YouTube:
Go to youtube.com/tv and press 'S' for search:
You will be brought to the screen below. Go to youtube.com/pair on your smartphone and enter the unique code.
Boom! Your smartphone now acts as a remote when watching YouTube on your computer/laptop.
3. Make it easier to read if you're using your Mac in the sun:
To switch back to normal, press the same keys again!
Note: This won't work until you go to System Preferences > Keyboard > Shortcuts > Accessibility and tick the "Invert Colors" box.
4. Extend the range of your car remote by using your head:
Hold the metal key part of your key fob against your chin, then push the unlock button. The trick turns your head into an antenna. The fluids in your head make it a good enough conductor to actually increase the range of your key fob. Finding it hard to believe? Watch the video: