I'm not going to tell you how to make one, I'm showing this 3 item and you know what to do.
3D printed case http://www.thingiverse.com/thing:664703
7" LCD Screen http://stores.ebay.com/vrglasseskit/VR-Glasses-/_...
Oculus Rift DK1 Tracker http://vrglasseskit.com/
There will be a retail version Oculus Rift at the end of 2015, and only the DK1 is the open source VR Head Mount Display, so it is important to make a clone here.
Step 1: Last Step
After you get all the parts and connnect to PC HDMI Cable USB Cables only, start to play game from https://share.oculus.com/
Then try other PC Oculus Ready game.
Suggest to use Oculus Runtime 0.4.4 if you try other PC Oculus Ready game
U don't need any programming or soldering or hacking if you buy the parts at above link.
What you need is a skill handmade work for the case, or using 3D printer to print the housing.