This thread on yelp is reminding me of all the great tv I used to watch as a kid. This stuff intensely formed the person I am today! The shows, in no particular order:
David the Gnome
Under the Umbrella Tree
Salute Your Shorts
Are you Afraid of the Dark?
Clarissa Explains it All
Saved By the Bell
and these are just the ones I remember. There was some show on Nickelodeon (around David the Gnome time) that was about a girl and her koala... I wish I could remember the name. And I'm fairly sure it's NOT The Little Koala. OH MY GOD GOOGLE ROCKS. It's the Noozles! Yeah. Ok.
Update: Oh my god. I found a THEME SONG. here. And this guy has a fairly accurate description of the show.