There isn't a recipe you can follow to do it, because there are many, many different ways of making a custom case. Any kind of building or sculpting skill you already have could theoretically be used to make a case.
You need to be sure to leave adequate ventilation, but other than that, it's pretty much wide open.
If you don't feel skilled enough to make a case from scratch, you can customize an existing case by using special parts like lighted fans, LED strips, etc.
The first step is to find a large enough piece of wood. Then, draw in pencil the outline of what you would like your desk to look like. Next, you saw the rest off, very carefully. Then you can round the edges if you like, but this isn't necessary. Attach the legs on the bottom side using special wood glue. Make sure the parts stay together. Then paint the desk, in whatever color you prefer.
Umm... generally there is a set of instructions in every Mainstays set-up boxes. But overall you would need some of the most common tools (screwdrivers, hammers, etc.).
One can learn to make a computer desk hutch from scratch at your local Home Depot store. Home depot has various how-to seminars. One may request one on building desk hutches.
If you want a great computer desk on a budget think about building your own desk with computer desk plans that match your vision. Building a desk can give you better materials for less money.
One way to save hundreds of dollars on office furniture is to build your own office computer desk. An office computer desk is a cinch to build, and it only takes an hour or two.
The OfficeMax Corner Computer Desk is easy and light weight too
I would definitely purchase a computer desk with an easy to assemble hutch, as they are generally cheaply priced. http://www.amazon.com/Computer-Desks-Hutches/b?ie=UTF8&node=1069106
GALANT Corner desk is easy to assemble.
A computer work station for home use should be simple, lightweight, easy to assemble, and affordable. A home computer desk usually has basic features such as a slideout for a keyboard and a bottom section to hold a desktop computer.
Please assemble the desk as quickly as possible.
It can take anywhere from thirty minutes to one hour to assemble an office desk.
Many of the desks available by mailorder are quite easy to assemble. However, it depends entirely on the type of desk and the company you order it from.
Sauder computer desks come in many sizes and styles. They look great in a home office, and are affordable. They are easy to assemble with clearly labeled parts and instructions.
Assembly Instructions, Marin Wine & Storage Cabinet Tobacco
It is not to hard it comes with instructions.
A reception desk is mostly a computer desk, but has more drawers for filing.
You can find ready to assemble office furniture at Staples, Target, or WalMart. There are also nicer computer desks available at Crate & Barrel, Thomasville, or any other furniture store.