There are always resources out there for you to get help if the content here isn't enough.
MySQL Forums are a great place to ask questions and get answers. Everything is topical, and you can even subscribe to a thread or to the entire topic of your interest via RSS!
The MySQL Mailing Lists also are a very helpful resource. Before subscribing and posting, make sure to search the list archives - maybe your question has already been answered!
IRC or Internet relay chat is the ideal way to interact directly with MySQL users and developers in real time. See the dedicated resources page about IRC for more info on this particular resource.
There is a large number of MySQL-related Usenet Discussion Groups which also provide help and support.