I think the model I would suggest is indeed close to what Joel is saying—try it out system as opposed to guessing a priori how you will be affected by things. More specifically, track your work hours/​productivity (if you think that is where the bulk of your impact is coming from) and see if, for example, donating blood on the weekend negatively, positively, or has no effect on them. I think that my output has gotten higher over time, in part, due to pretty active testing and higher amounts of measurement. - Related post
I think the model I would suggest is indeed close to what Joel is saying—try it out system as opposed to guessing a priori how you will be affected by things. More specifically, track your work hours/​productivity (if you think that is where the bulk of your impact is coming from) and see if, for example, donating blood on the weekend negatively, positively, or has no effect on them. I think that my output has gotten higher over time, in part, due to pretty active testing and higher amounts of measurement. - Related post