There are some good remarks posted. I started out just watching my rigger pack my reserve. When I wanted my ticket I would seek out the different riggers and ask to assist. I picked up both poynters Manuals and all the other books that are stated in the other postings. Another it the Material sample book. This will help you understand the different material that go into making a rig. To be a good rigger takes a lot of work on your part. I have started training 15 different people who thought they wanted to be a rigger. Only 2 completed. None of these people I charged, but it took a lot of my time for them not to work through it. Wanting to know your gear and how it works is a great start. Lear from all who are willig to go over things with you. I still lear from people even today. If I can help let me know.
Master Rigger Ben Crowell H.A.L.O Tandem Master