Curating the web with Scoop.it

I'm exploring options for curating and sharing the web as I find apps, articles and how-to's that support student centered learning. As you can see from the screenshot of my Chrome toolbar, I haven't exactly settled on one tool to use.

Diigo, Scoop.it, list.ly, livebinders, edmodo, twitter, pinterest - What tool are you using curate the web?