It's easy to get stuck in a loop sometimes. Memories and perceptions-revisited can give the creative artist a sense of being in a rut, standing still, or not moving forward. This can be reflected in one's work process or in ones output, where we feel a little bit like we're not evolving or challenging ourselves to explore new territories. Sometimes this can lead to frustration or a notion of being caught within the layers of our own psyche, unable to push forward or move beyond our own personal experiences.
It's important for an artist to recognise that sometimes standing still is a part of the creative process. It's not necessarily an indication of one's abilities or denials, but an integral part of the journey. Sometimes taking the time to stand still and look intensively at the view for a long period of time can in itself bring about the insights which can lead to momentum. There is nothing wrong with exploring the one piece of real-estate over and over again. Perhaps there is something here that you've missed or that you feel the need to explore more deeply. perhaps you haven't been able to see the forest for the trees, or just maybe there's something more to explore here that just needs a little unearthing to find it.
Of course, most of us feel the excitement of doing something new. It's exhilarating and tantalising. But don't discount the benefits of staying in the one place for a while. Familiarity can breed it's own unique forms of exploration, and sometimes one can only find things previously hidden by hanging around and digging in the one spot for a while.
Momentum is a great thing, but don't dismiss your process just because you're not experiencing it all of the time. Stay still. be quiet. you might be really surprised at what you find :)