What's Next

For further information on related AVR products and IDE, refer to the links below:

Software:

Atmel Studio: http://www.microchip.com/avr-support/atmel-studio-7
Atmel Studio help: "Help → View Help" (shortcut "CTRL+F1")
Atmel Gallery: https://gallery.microchip.com/

Firmware:

Atmel START documentation: http://start.atmel.com/static/help/index.html
Atmel START examples: http://microchip.com/start/#examples

Hardware:

AVR042: AVR Hardware Design Considerations:http://www.microchip.com/AVR042:AVR_Hardware_Design_Considerations
AVR IBIS files: http://www.microchip.com/doclisting/TechDoc.aspx?type=IBIS
AVR BDSL files: http://www.microchip.com/doclisting/TechDoc.aspx?type=BSDL

Recommended programming/debugging tools:

Atmel-ICE:
- Documentation: http://www.microchip.com/Atmel-ICE_Debugger_User_Guide
- Buy: https://www.microchip.com/Development-Tools/atatmel-ice
Power debugger:
- Documentation: http://www.microchip.com/42696D_Power_Debugger_User_Guide
- Buy: https://www.microchip.com/Development-Tools/atpowerdebugger

Other:

AVR Freaks^®: http://www.avrfreaks.net/
Application notes: http://www.microchip.com/paramChartSearch/chart.aspx?branchID=30047, find the preferred device and go to the product page. All relevant application notes can be found under the documentation tab.
AVR product selector: http://www.microchip.com/paramChartSearch/chart.aspx?branchID=30047
More technical documentation concerning various products: https://www.microchip.com/webdoc
Microchip Technical Support: http://www.microchip.com/support/hottopics.aspx