You can vote for your favorite show here
http://richlabonte.net/tvvote/
You can vote has many times has you want for the same show, but make sure it has been an hour. For instance, if you vote at 5:15pm, make sure it's at least 6:16pm for the next vote.
Here is the top ten currently:
01. Xena: The Warrior princess (My favorite)
02. Farscape
03. Queer As Folk
04. Angel
05. The X-Files
06. Star Trek: The Original Series
07. Firefly
08. Buffy the Vampire Slayer
09. The Simpsons
10. Babylon 5
You can change this. They have over 100 shows ranked by viewers. If your show isn't where you want it, keep them votes coming. I would eventually like to see Hercules: The Legendary Journeys enter the top ten. He peaked at ten for like one day, but lost it. (This isn't really an accurate voting system since you can vote more than once. I voted over 100 times for one show.)