While roughing out a bowl I recorded two short videos.  In the first I try to provide some detail into how to do bowl hollowing cuts, and specifically the entry thereof.  When I started this hobby I had a really hard time figuring out the best way to do it despite watching lots of videos and reading books.

In this video I show a marking jig for a set of chuck jaws.  It lets me draw a circle for either the recess or a tenon.