It's all going to be dependent upon what they are tuning and what they are using as a power adder (if any).
You tune a turbocharged motor differently then a N/A motor, time A/F ratio,etc are all going to be different. Each motor is going to be different too, some motors like to run richer then other motors. For example h22a's like a richer air/fuel ratio then say a b16a (on boost). I supose you could type up a "general" guidline, but as far as tuning tips goe it's going to have to stay generic to be helpfull.

Maybe make sections.
tuning forced induction basics:
Tuning for all motor power basics:
Stuff like that.