Waiting for new episodes:
Big Bang Theory;
Community (Watch this if you like BBT or HIMYM - it's GREAT)
How I Met Your Mother;
Supernatural;
South Park and Family Guy.

Watching in the meantime:
House (currently S02E22);

Shows that're currently off the air:
Walking Dead, Heroes (Season one was great, but went downhill rapidly afterwards), and Firefly and The Colony.

I also used to watch The Mentalist, but I got tired of it after a while.