Hi Teresa_Friend:
We have a whole page with cheesecake tips!
http://www.bettycrocker.com/how-to/baking-basics/Desserts/How-to-Make-and-Bake-a-Cheesecake.htm
How
do you know when a cheesecake is done? Touch the top lightly, or gently
shake the pan. The center may be just firm to the touch or jiggle
slightly, but it will set during chilling. For best results, don’t poke
the tip of a knife into the cheesecake to test for doneness because the
hole can cause cracking.
Hope this helps! Sincerely, Cate