Fencing Tip: Permanently Grounding Power Fence

I'm building a permanent power fence.  How do I make sure it stays permanently grounded? 

Use a minimum of three, six-foot long, galvanized steel ground rods, spaced at least 10 feet apart. Drive them into the ground so that only 2 or 3 inches are visible, then securely clamp one continuous galvanized wire to each rod.