It is a personal favourite of mine, and this makes for a quick 10-15 minute burst of concentrated play. This can trigger the flow state we have been discussing and help my own concentration on other tasks that follow.

There is a psychological concept called "flow", first described by Mihály Csíkszentmihályi (try saying that without speaking Hungarian). Flow is a state of mind where you are highly engaged in a task, and performing that task at your highest level of ability, and have a level of contentment in meeting your goals.