At the moment there's not too much - Pretty Little Liars and Huge are the main two. I'm also working my way through Dexter before the new season airs.
When it comes to September though that's another story! Luckily (I suppose) I live in the UK so I download a lot of shows because they're so late to air over here, so I can watch them when I have a spare hour or two. That'll be Gossip Girl, Glee, Greek, Grey's Anatomy, How I Met Your Mother, The Office, Community & Parks and Recreation.
Shows I'm not watching but want to get into - Covert Affairs, White Collar, and I want to get back into 30 Rock.
Gah, that makes me seem as though I have no social life! hahah