Recently I have been using the new CSS element called Filter alot, Its beautiful and easy to use, too bad not all browser are supporting it, infect what i know is for now is only -webkit- browser
Here are some properties that we could use:
If you intend to try out now, just do -webkit-filter: blur(10px); // or other properties
By mixing with some of the properties you can get great effects like those Instagram right on your browser, only with CSS, thats really simple and awesome for me.
here is a link to the playground, check it out.