For a week or two now, I alternate between sleeping about 12 hours a night, and 6 hours a night. But it's all good sleep! It beats the heck out of 8 or 9 hours of half sleep every night. This really isn't a lifestyle management thing, except that with our crazy bodies it can sometimes help to just go with the flow. There's one thing I've noticed that will guarantee poor sleep. If I get way outside my energy envelope, especially mental energy, my brain can't rest that night. Sometimes I'm in the middle of doing something, and just don't want to stop. And sometimes I sit up very tired, but too exhausted to stand up and get ready for bed. So I sit and play solitaire forever on my computer. Not very smart!