One at a time, and I have to set a very rigid schedule and stick to it, otherwise it ends up being too stressful. Sometimes the hardest part is stopping once I'

One at a time, and I have to set a very rigid schedule and stick to it, otherwise it ends up being too stressful. Sometimes the hardest part is stopping once I've worked the 2hrs I scheduled for Project X, when it's 10pm and there's nothing else going on, but too many nights of not stopping and I get tense and difficult to live with. Down time is important, too.