From time to time I post announcements about medical writing workshops around the US. But I realize, most of you cannot attend for various reasons (timing, cost, location, the dog is ill, etc.). So let me suggest that you try the AMWA Self-Study Workshops:
Note that I haven't taken them, but I have heard good things from people who have. If you are one of them, let me know about your experience and leave a comment. Thanks for reading!