Well BELLS OF ST. MARYS was spun off from GOING MY WAY and that was pretty good. On tv we had MORK AND MINDY which was spun off from a one shot HAPPY DAYS appearance. And then there were a whole slew of successful shows spun off from both ALL IN THE FAMILY and MARY TYLER MOORE SHOW.
Is that what you are looking for?
here is a rather lengthy list of TV spinoffs
http://en.wikipedia.org/wiki/List_of...sion_spin-offs