How do you favorite something you like on this site? I know how to fan something but I can't figure out how to favorite something?

There's a little green button that says "save" next to the orange "share" button under the button where you fan things (:

If you see a picture or video you like, underneath it will be an icon that says "fan of it" and another one that says "save". When I see something I like I select both of those...hope this helps.

there is a green button Save under a Fan of it? button. It means you add this content to your favourites.