[abraxasz]

Slightly unrelated. As part of the Seinfeld method (don't break the chain), I've been focusing on 4 tasks for 20 minutes every day. Some of them are very technical (asymptotic theory in statistics), some are more relaxed (programming Arduino, as a hobby). I have noticed two things:

1) getting "in the zone" takes less and less time. It used to take me most of my 20 minutes to actually get focused. Now, 3 or 4 minutes suffice.

2) the level of focus I reach is unusually high, especially for technical subjects.

A final remark is that I realized that you can do a lot of things by spending only 20 minutes every single day. A lot of things indeed.