Stop tinkering.
For the first couple of weeks, I put my predictions in the weekend before based entirely on "gut feeling", and then they day before looked more closely at them and tweaked them a little bit. I was very middle-of-the-table. This week, I half forgot and half didn't have the time to sit down and tweak my "gut feelings" from last weekend, and I seem to have done better for it. Much like my Fantasy Football team, constantly tinkering and tweaking seems to leave me worse off than if I just go with my gut and forget about it. Also, I get less grief from the other half about spending too much time on the football. So a win-win, haha.
EDIT: Scrap that. That Cardiff goal ruined everything.