well.....
there's not really a setting that everybody can go by, especially for fuel pressure. first, you have to look at exactly what you have, and how far you are willing to go? are your injectors stock? if not, what is the flowrate of the injectors? a good way to tune it (and to me the only way) is on a dyno. make different runs, steadily increasing fuel pressure. once you see horsepower at its peak and no longer increasing (compared with the other runs), that is what you keep fuel pressure at. if you change your fuel pump or injectors, then your fuel pressure will also change. if you add any ecu piggy backs, or retune your ecu, then it's also a good idea to re-do the fuel pressure. if you're not going with aftermarket injectors, make sure you have good, clean injectors.