Being creative is an exercise in problem solving. Sleep facilitates insight that often solves problems, sparks new ideas and design forms.
When I wake up I try to take a few minutes just to lay their and let my mind wander. I have come up with some of my best ideas when I just wake up and I have started to record them on an app on my phone. For some reason if I move to much trying to get a pad and pencil the ideas start to fade and I can never get them written down exactly as they come to me.
Keep a note pad or recorder next to where you sleep. Having easy access to document your ideas makes them easier to remember and put them into action.
Surround yourself with things that inspire you and can help the process both in your waking and sleeping hours.
Do you find those few minutes before you fall asleep or wake up to be inspiring?