I'm a bit of a newbie, but I hope this helps.
Work in different mediums. If you work in traditional, try some digital. If you with with paints, try some drawing. If you work with video, try photography.
I find that working in different mediums allows me to get different perspectives on the same problem. I see how something works in one medium, and sometimes, with effort, I can grasp the mechanic behind it more fully due to the change of perspective and method.
I'm still learning myself, so it's a bit more of a beginner's tip, but I think it probably works pretty well for experts too.