Over the past month, I have started taking melatonin supplements, instigated a new productivity system, implemented significant changes in diet and begun a new fitness routine. February is also a month where I anticipate changes in my mood. I find myself moderately depressed and highly irritable with no situational cause, and I have no idea which of these things, if any, are responsible.
This is not ideal.
I'd been considering breaking my calendar down into two-week blocks, and staging interventions in accordance with this. Then the restless spirit of Paul Graham sat on my shoulder and told me to turn it into an amazing web service that would let people assign themselves into self-experimental cohorts, where they're algorithmically assigned to balanced blocks so that effects of overlapping interventions can be teased apart.
I've never really gotten that into the whole Quantified Self thing, but I'd be keen to see if something like this existed already. If not, I'd consider putting such a thing together.
Any discussion/observations on this general subject?
As you seem to recognize in your reply to Gwern, this probably cannot function as a stand-alone feature, but needs to sit atop a Quantified Self platform. The minimal system is one that just keeps track of your data, while making data entry easier than existing systems. The next step is to figure out what things you're tracking correspond to what things I'm tracking. This is difficult to combine with the flexibility of allowing the tracking of anything.
Why haven't you gotten into the Quantified Self thing? At the very least, they probably have better answers to this question.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.