I was imagining a site that would look at all the different things you're trying at the moment, look at all the things other people are trying, and give you a macro-schedule for starting them that works towards establishing cyclicality across all users.

It could also manage your micro-schedule, (prompt you to take a pill, do twenty sit-ups, squirt cold water in your right ear, etc.), ask for metrics and let users log salient information and observations. Come to think of it, once that infrastructure is already in place, there's no reason you couldn't open it up as a platform for more legitimate and formal trials.