I am a beginner using a personal database in ArcMap and ArcCatalog version 10.1, (though not a beginner in using ArcMap and Catalog). I would like to find detailed info on workflow protocol, or how to order my tasks, so I don't run into trouble with locks. It seems like I have often needed to shut down applications just to release locks, but even when I do that I am never sure if I will be able to do what I need to do. When is it safe to delete a lock file? I would love to start out with clear instructions about what I can do when and where and how locks will come into play as I edit a map and associated personal (or file) geodatabase. Are there any tutorials or videos on this subject? In my situation I am not yet concerned with other people needing to edit my files, my lock problems are only mine as a single user at one hard drive location. I am not working in a network environment. Thanks in advance.