Chica, of Conversations in My Head, has a great site discussing her ups and downs (no pun intended) dealing with bi-polar disorder.

My symptoms are constant and unpredictable. There are stretches of time where I find myself uninterested in hobbies, the kids, days where I want to sleep all day and days when I can’t sleep. There are days when I’m on top of the world, where I organize and reorganize the cabinets in my home, only to crash into an irritable and anxiety ridden state. Bipolar affects the way I live and how I breathe. Unlike regular mood swings, my mood swings hit heaven or hell. It affects my activity level, my judgment, and behavior.

Read more here.