2.0 cu engine valve adjustment aka the dark arts

[diesel11]

Evening all, please forgive my post if I'm going over old ground, but I am after some advice with setting the valve clearance. I've read the wiki page, I've read the Haynes manual, I've read various articles all of which seem to contradict each other, I have hydraulic lifters but the valves need adjustment what is the definitive way of setting them correctly.
Once again sorry if this is old news, but I brought my van with a burnt valve and after building the engine I really don't want to have it happen again
Cheers in adavance

[ELVIS]

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