There is a great website with bulletproof step by step pictures and explanations on how to adjust valves. If you do a search on this website you can find it.. lets see..

http://www.picturetrail.com/sfx/album/view/1803105

That should be of some use mikewags!

last time I adjusted my valves I did it cold (I don't do to well with heat, even with gloves I burn easily) the way I do them is tighten them up on the spec size till there's a bit of resistance, then make sure the next size up won't fit. tighten it back up and double check, then move to the next one. it worked out pretty good and my car ran a bit smoother afterwards (the valve adjustment was really loose before I adjusted them)