You can only get so far using println. To do real development you will need to advance past the basic Arduino IDE to a more production like development environment that supports integration with JTAG and SWD. This workshops covers the various options and we get our hands dirty with the Atmel Studio Version 7.
This workshop is under development. If you would like to be notified when it is available, click on the Notify Me button and we will send you an email when it is ready.