With the release of Sitecore 8.2 version, a new tool was also release. It is "Sitecore Express Migration Tool". As the name suggests, it facilitates upgrade of Sitecore versions.
Since this is new, I thought of give it a go.. with very basic installations..
Initial Websites
Source : Sitecore 7.2 rev. 151021 with Launch Sitecore Installe
Target: Sitecore 8.2 rev. 160729
Sitecore Express Migration Download and Documentation
https://dev.sitecore.net/Downloads/Express_Migration_Tool/10/Express_Migration_Tool_10_Initial_Release.aspx
Steps
Step 1: Specifying input parameters
Step 2 : Selecting which content to be migrated
Step 3 : Analyzing
Step 4 : Comparison results and Provide which items/files should be migrated
Step 5 : Migration & Summary
Nothing fancy.. just a walk-through of the steps off course...