This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
-- Don't block the EDT. Understand the single threaded rule.
-- Don't use a null layout. Learn how to use layout managers.
-- Don't use a visual designer. At least, not until you know enough to be able to read and understand the auto-generated code.
There are no new questions, but there may be new answers.