WUS has a nice thread about breaking in mechanical watches – why don’t you just wear them? Fun advice.
To maintain accuracy it is not necessary that you wind up your watch on a regular basis if you don´t wear it day by day. But if you`re wearing your handwounded watch day by day it seems reasonable to wind it up daily, so that the tension of the spring is kinda constant which ist the best way to provide accuracy.
No problem with automatic watches though when wearing on a daily basis because the automatic winding “automatically” provides the “right” tension of the spring.
Breaking-in a Mechanical Watch?? [WatchUSeek]