By drive skills forward on your own, do you mean by working on side projects? If not, you should be looking at innovative ways to use your API through personal

By drive skills forward on your own, do you mean by working on side projects? If not, you should be looking at innovative ways to use your API through personal projects. Why not create a simple app that uses the API and put it on the app store? Create a mashup with your API and another API. But do something, otherwise you'll have regrets later in life.