Mostly YouTube. But I also use NationStates.net because I enjoy games about politics
This site has played a large role in lowering my FB time. I removed FB from my phone and now scroll through here in it's place.
I only find myself getting on FB every few days now on my home computer, and even then it's usually for less than two minutes on those occasions.
So for that, thank you Agostic.com.
Other than that ... news sites, financial sites, Kiva, and (of course) porn sites.
I only found this site today, but I can easily see it replacing my time on Facebook
Kahn Academy. Facebook (mostly for business purposes though), Steam, Gmail, YouTube.