The way I always do it is:
Turning the crank bolt for each cylinder: When the exhaust rocker starts down, set the intake. When the intake rocker goes all the way down and start back up, set the exhaust. To set a rocker, spin the pushrod with your fingers until you feel resistance while tightening the nut, then it's a 3/4 or full turn from there, I don't recall which. Obviously easier to do with plugs out.
The shop manual has the procedure also.
I'm sure there are other ways. An old school guy told me this way many years ago and I've just stuck with it, never have any issues.