Take all plugs out and put each piston up tdc and hook up compressed air... before removing that cylinders springs, incase you drop a valve down... with any luck...it wont come out of the guide that way.
Also... lay a towel across the drain back/push rod side of the head incase you drop the locks when removing them.
I'd have said to stuff towels in those drain backs... but too many have somehow pushed them in or forgot and then the old rag sucked to the pickup or rolled n ripped in the cam bla bla stories reemerge .
It's no sweat, takes about 5 or 6 beers time to do.
