Here are a couple of new Moodle tutorials I've just finished putting together for colleagues. They cover some of the basics of setting up and organising gradebook items -- including some of the confusion and mistakes you may need to deal with -- for a Moodle course (Part 1), and then how to upload assignments that can align with your gradebook categories, or create independent grade items not linked to specific uploads or tasks on the course page (Part 2).
Part 1:
Part 2:
For more of my Moodle tutorials, check out the posts here.
;-)