| What to Expect
If you live in a rush and speed seems to be ruling your life right now, or if you feel unprepared or unable to really engage with what you are doing when you are doing it, buffer time will make you feel sane again.
Because of the cool-down time, you will have time to actually understand what you managed to do during that activity period, and remember it (many of the people that forget where they were in a process actually don't give themselves time to recap what they did at the end of that activity; they assume their brain should be a machine that knows, though they don't allow it the processing time it requires).
The warm-up time will help you be more goal-oriented and intentional about the next activity, and have the time to get in the mood for it. It will allow you to step into the present, to recall to mind the context of that project. Think of it like tuning your instrument, before starting to play. It will affect the quality of the entire performance.
See blogpost Buffer time to sustain time management sanity.