[niente_]

I tried to cut down my time on facebook too. I did the following things:

1) Cut down your friends list to only people you want to keep in touch with. Delete people you don't know and ones you vaguely know. This gives you less to look through on your updates, and less people to stalk.

2) After that, when someone's status comes up who you aren't too bothered about, or who update constantly, press "Hide" next to their name and it'll stop their posts showing on your home page. Again, less to look through, and less time on there.

3) Hide or block applications. Stops you being tempted to play them and they're very addictive.

Hope this helps.