Only occasionally do I have significant insomnia since my medication cocktail does seem to keep the mania away. But a little slips through on occasion. When it does, I tend to bake and spend time on the computer (forums, blogs, writing blog posts). In the past I used to drive around town or beyond. Sometimes just driving, sometimes going to 24 hour joints, sometimes going to early opening grocery stores. I stopped the driving, though. My husband begged me to stop it. He'd wake up and find me gone at 3 am and get very scared. He had good reason to be scared because I once had a pretty scary incident in the middle of the night when manic.