Hopefully with each thing that you do you're learning something you're growing and you're pushing yourself a little harder in some way or another. So I think you'd be in real trouble if each new thing that you create didn't feel like 'Oh wow. I feel like I'm doing something a little different this time.'
I know it sounds new age-y but what I've truly come up with is that you really need to trust that you're on your own path as long as you stay true to it and you show up which is 99% of it.