In general I just turn the TV on and let it go on one of my more favored channels, but I've gotten hooked on some shows lately.
I dig:
-Nanny 911 & Super Nanny... SN is not as good though, which is surprising since you'd think they'd be identical.
-Wife Swap (or whatever that is on ABC)... That is just great.
Beyond that I'm a pretty big Comedy Central Loyalist... Had Spike not taken Star Trek TNG and DS9 off the evenings, i'd still be watching it nightly. What a bunch of dickweeds.

I watched the first couple rounds of American Idol to see their worst get kicked off. The actual competition's retarded to me, but I enjoy the people embarassing themselves in the first two episodes. I loved listening to Howard Stern's recap of them. Funny.
Which brings me to the other show I watch... Stern... I tend to watch him on E! since I am a Stern fan through & through. My buddy got Sirius for X-Mas (just on a whim from his dad) and it's really great... I wasn't gonna go over, but seeing the product for what it is, I think I'm gonna buy into it just because it's so great on its own.
Hmmm, beyond that I like the History Channel and sometimes just put it on and leave it on if Comedy Central's airing crappy stuff. Wanda Does It, Shorties Watching Shories, and Drawn Together just sucked to me... I hate that Blue Collar Comedy Tour too.
Comedy Central still has the best programming out of any channel on TV right now though.
Oh, but HBO's great when Deadwood, Sopranos, and Bill Maher are all new... I dig Dennis Miller re-runs too, and they've had great stand-up specials lately (Lewis Black, and Dave Attel from 1996!), but they're all reruns or new crap I dislike right now.