Always wind clocks very gently and smoothly but always fully. We have all heard the story about over-winding clocks. This is a complete myth, clocks cannot be overwound. However, they can be damaged by winding too roughly, they must be fully wound for proper performance. Most clocks are eight day clocks, so will need winding once a week. My advice is to pick a time on a certain day and always wind at approximately this time. Sunday is a traditional day for winding clocks and I do it around midday as neither hand would block any of the winding holes.