don't watch more than 4 hours of TV daily for one month

In the last 3-4 weeks I’ve gotten into a bad habit where I am watching up to 6 hours of TV a day which is way too much. I should be doing other things or at least motivating myself to do other things instead of sitting in front of the TV in the evenings.
I am trying to keep off the computer and am finding myself in front of the TV more and more. Most days (normally) I watch under 2 hours and I want it to go back to that because I will then have more time to study/work or take up a hobby.