One of the best ways to learn, is to teach. Become a SIG leader and orchestrate the agenda. You can teach, have others present, bring in outside speakers, do group projects, or whatever your creativity can dream up. If you are interested in helping in other ways, contact one of the directors or officers listed on the inside of the magazine. You already own the manual, so go ahead and read it.
Some manuals are better than others.
Do give the accompanying documentation a chance before visiting the local bookstore. The industry moves so fast, some books are often outdated by the time they hit the shelves and this makes it necessary that you read periodicals. Magazines and newsletters provide current tips and techniques to keep you on the leading edge. Also, you can learn about the pros and cons of a product that sounds interesting if the reviews are candid. In addition, read the advertisements, it is amazing some of the tidbits you can learn from them.