I haven't created too many tutorials in my day, but whatever I do make I will share here.
Skin is Basic MyBB Skin Conversion (Opens a new tab)
This is a work in progress tutorial that is currently on hiatus but has a lot of good info already in there. Follow along with me as I convert the free Joss' Basic jcink skin to a MyBB skin with the hopes it will help you to be able to do the same with your own skins!