This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
To make SOA work, there are some basics that you should understand and follow. Here I will focus on one, loose coupling, which refers to many other principles of SOA and list many others, with lots of links to sites with good explanations and guidelines