Custom actions that should be standard actions

On the MSI front, Aaron Stebner from Microsoft posted a list of Common custom actions that should be standard actions. It is a fairly good list. Please check the link and add to the list!

Aaron is quite correct that writing a solid (read best practices compliant) custom action is difficult. Number 3 on his list is "Create user accounts." If you need to do this, make sure to check the Platform SDK, as well written sample code for this action is included.

I'm going to head over and add my two cents to the list...