And with all respect to expatinuk, depending on your field (especially if it is English or history), don't be surprised if you will be a VAP for a number of years. If that happens, use those VAP years to publish, publish, publish. You'll then be in a much better position to get a TT position.
Oh, I know all that. But the OP can't get snuggled in at the school to the point she doesn't finish the Diss or work like crazy to publish AND work like crazy to find the tt.
A VAP is good for paying the bills... but it's not an appointment you can count on.