Having spent the last couple of days watching the Rapid and Blitz World Championships I became, once again curious about the following subject.
In some circumstances, especially in blitz games, it can be a slight but significant advantage to be able to perform the move as quickly as possible in a physical or mechanical sense. Now, playing a lot certainly gives confidence and ease, and there are some simple principles (such as short moves cost less time), but I was wondering if some players actively and in a structured way train this aspect of the game. To make this question answerable let me ask specifically:
Are there any books or other sources that discuss ways to train and to improve carrying out moves quickly (in a physical or mechanical sense)?
However, I would also be interested in slightly more anecdotal answers on this subject. My primary intent was to ask this for over the board games, but I aspects specific to online games are also welcome.