If you want to put your video files online using HTML5 then it's recommended to have three different formats for a full browser support. Those formats are mp4, ogv and webm.
I will show you how to enable desktop notifications, so you will notice a new email, even if you are not in the window where you have your Gmail account open.
If you know how to sing or hum a song, but don't know the title or the artist performing it, you can use a midomi website which will help you find the the song.
If you are sick of all the stuff a certain Facebook Page is feeding you or you just don't like the brand anymore, this is how you Unlike Facebook Pages.
DOF or Depth Of Field is a commonly used technique in photography where you can precisely focus only part of the face or object you are taking shot of. Let's recreate this using Photoshop.