[colug-432] Documenting System Installation, Configuration, and Changes

[jep200404 at columbus.rr.com]

How do you document the installation, configuration, 
and changes to a computer? What are the best practices for such? 
This would be for a development computer where experimental 
futzing about is often needed. 

I mostly use plain text files with prose in chronological order, 
with occasional screen shots. 

I have been STFWing, but just finding stuff for how to install 
various vendors' add-ons.