It's pretty easy. The hayes manual explains how to do it pic by pic. The helms probably does a good job too (if not better). Getting ahold of one of those manuals would be a good idea for any DIYer. Basically you remove the valve cover and timing belt cover, which is easy, then adjust each valve by cranking the cam shaft gear to the appropriate place, marked on the gear, then measure the valve lash with those width thingies (lol, dont' remember the name) and adjust the valve with a ratchet so that the width measurer is snug but not tight. Baa...just get a maunal. It will explain it. You can get a hayes at any auto parts store for less than $20. Or fork out the $70 or so for the helms.

Going with that second guy though, I've done the same thing. I adjusted the valve clearance on my '99 twice in the last year since the engine was a little "clicky" when cold. Both times I went in I found that the valves were already adjusted to the appropriate lash. Honda's engines are just a little clicky. If your idle, response and gas mileage are all doing well, chances are that you don't need an adjustment.