Stop watching TV.
Now, I don't mean stop watching TV period. You can still turn it on once a week to watch your favourite show. But turning the box on every single night leaves you zero hours to do work on your novel. This is something I learned by accident when I participated in NaNoWriMo and very quickly gave up on this pastime. It's possible, trust me, and you don't really lose anything.
Anyway, TV is for unimaginative people. What's wrong with sitting down and reading a book. Do you need to watch reruns of QI? Is it imperative that you see this cooking show, though you may never look at or think about the recipes ever again? I think not. So put some time aside, and leave the box in its corner. Your inner writer will thank you for it.