Agree with VK5RC. If you haven't built the shack yet, now is the time to arrange for the RF ground. A very basic intro is here:
http://www.arrl.org/groundingThe RF ground topic isn't of so much interest for general electronics lab use, but if you're intending to transmit signals efficiently, it's a part of your antenna system.
Speaking of antenna systems, that's something to consider early as you plan the shack. It's not a bad idea to seek the advice of a local ham club, with members who can take a look at your site in person and make suggestions appropriate to your situation.
Also, consider the RF impact of each item you put into your shack. Things like switching power supplies, fluorescent lamp ballasts, computers, etc. can really mess up reception of weak signals on the ham radio bands. And unfortunately, it's difficult to determine how noisy or quiet a device is at RF without testing it yourself. If a device has an FCC id, you may be able to search the FCC site for some test results.
At the very least, I'd consider having an easy way to disconnect power to all my test equipment, computers, or other potentially noisy devices. I'd like to be able to switch all the noisemakers off while operating the radio, and then perhaps switch them back on while constructing electronics devices.
For ideal ham radio work, I sure wish I could have a shack far from the electrical grid, using DC batteries for power (solar charged?), with illumination provided by candles, incandescent bulbs, or LEDs running off of DC (no PWM). I sometimes operate portable from remote locations far from the electric grid, and it's amazing what you can hear when you have little or no local noise.
Dave's linked video, as well as the comments of others, will cover the general electrical engineering aspects of your question well, I believe.