coolant leak

[MikeT]

Over the past few days I noticed a slight (few drops) of fluid under the engine. Suspecting coolant, this morning I started her up, let the temp rise and proceeded to trace down the source. Crawled under and noticed coolant and slight bubbles from the right rear headgasket area. No coolant in the oil. No oil in the coolant. Car has always run like a top. Over the past month or so I have noticed a slight drop in the coolant level, although the car has never run hot. I suspect a leaking head gasket and plan on tackling the job myself. Any recommendations on what else this might be? Special tools and sage advice before proceeding on the repair?
Thanks,
MikeT