Good things to keep in mind.
http://www.6thgenaccord.com/forums/showthread.php?p=418985
How to do it. (same process but we have 6, 3 in the front, 3 in back)
http://www.ifixit.com/Guide/Installing-1998-2002-Honda-Accord-Spark-Plugs/3634/1
You need Allen keys (I forgot the size we need), spark plug socket (any auto parts store will have it), Ratchet, Extension, 6 spark plugs, anti-seize, and also a gap gauge to check the gap on the plugs.
While you're at the auto-parts store, pickup a copy of a Haynes Repair Manual. It's a really good way to learn how to Maintain your car without spending $$$ for a shop to do it. It'll also show you how to do the spark plug replacement step by step.