windows server 2008 - Set environment variables from command line - and make them stick globally

In Windows 2008 Server R2, once I set an environment variable in the command line, how can I make it stick?
For example, it's easy to write:

set path=%path%;

much easier than the crummy right-click My Computer method. But once I set this, the changes disappear with my command window. How to make them stick? I want to do the same with JAVA_HOME and some others as well.

Answer

As mentioned in more detail in How do I set PATH and other environment variables?, you can use setx to set a variable permanently:

setx MyVariable "C:\Path\to\Folder"
setx JAVA_HOME "C:\Path\to\Java"

et cetera.