I was often limited in space in my various residences so I simply adapted the forms by adding steps--usually taking a step back before a forward step to avoid hitting walls. I had observed one of my teachers do this once during a class with a lot of people. This will also help you develop mobile footwork. Now I practice a very compact Wu style, based on my current teacher's methods, and I can practice this without adapting it almost anywhere.

Another thing you can do is practice part of a form. For instance a sequence like Cloud Hands and go both directions.

Rich