M.
Colleen, you are not alone. My 16 month old wakes up all the time. I find that what works best for us is keeping with a routine at night... bath...read books...it is getting better.
I wouldn't cut back on the naps...I've heard it doesn't help them with sleeping through the night. In fact it can be a reason why their not.
My daughter wakes up a lot because she has crept up into the corner of the crib and we have to readjust her. It could be something as simple as that.
Good luck,
M.