Debugging Sitecore in most cases requires you to open attach to a process menu in Visual Studio, then enable display for processes of all users, find appropriate IIS process and фееср to it. To much hassle, isn't it, especially taking into account that you may need to repeat that again and again hundreds / thousands times as a part of your work?
Ok, here's the solution to take your debugging pain off: Attach To IIS extension for Visual Studio. At the moment there are extensions for 2012 and 2013 version, as I haven't tried it in 2015 preview.
Download extensions for your Visual Studio version:
Attach_To_IIS_2012.vsix (58.6KB)