You can easily always have an empty news feed without any custom CSS or userscripts by simply unfollowing all your friends (unfollwing is not the same as unfriending and can always be reverted with a single click).
I did this, I had ~300 friends and each time I checked Facebook I would unfollow every single person on the feed. Within 3 days I had no more posts and the news feed. I also did this with Reddit. It has slightly helped with "changing the channels" between digg, facebook, reddit and hacker news during finals a few weeks ago but being off for the summer I am reverting back to it and becoming less productive. If other people have this problem I would recommend the chrome extension concentrate.
