A guide was recently posted on SnapGuide on building a big media server, specifically geared toward relative beginners when it comes to constructing your own hardware.
A lot of the advice is pretty basic stuff, but it's still quite useful, especially for those who might be intimidated by the thought of building their own hardware. As stated in the guide itself:
In this guide, I'm going to show you how you can build a home media server on a budget. The server itself is protected by a parity drive, giving you peace of mind with your files and media.
The guide itself is fairly brief - only 29 slides - but this is a bit misleading, as some of the slides direct to another guide already created for various tasks such as testing hardware compatibility and creating a USB boot disk.
Some of this is stuff that might be pretty basic, but everyone has to start somewhere. If you don't know where to start with building your own Media Server, this is certainly a good place to begin.