Show some results in the standard output is the first experience in how to debug your code. What is the next step? Probably, the first answer that you found was: start the observer. After some minutes with an awesome feeling, you asked yourself: What I should look here?
In this talk, you will meet some tools, learn how to debug and profile your system, check crash dump and how to find and deal with the most common cause of failure. More than that, you will understand the concepts behind the reports and the observer tool.