Looking for an article

[Tok]

While forums are still active, I would like to ask some help: I'm looking for Steve's article, where he describes the method of switching different activities (or its priorities) not within the frames of one day, but within the frames of weeks. He tells there that it's more effective to do one activity (work or hobby) for a week, then switch to another one for a period of week either, and so on.

Can't find it via Search, because don't know how to make the right query.

Thanks in advance!