Sing
When you are alone in your car, try singing about something you are working on. This taps into and exercises your right brain. Have you ever noticed how it is easier to rhyme when you sing than when you just speak or write? This is because the right brain is better at pattern recognition. By doing this brain exercise regularly you can train yourself to tap into the power of the right brain. This will make you a more effective problem-solver. If you doubt the distinction between the hemispheres of the brain, look at how stutterers can stop stuttering as soon as they start singing. Try it.