so your distortion, volume boost, EQ's, filters, wah pedals, etc go first...then your phasers*, choruses*, flangers*, delays, and reverbs.
*these effects are traditionally created by very very quick and soon delays that create in and out of phase sounds and so are time-based effects.
edit: only exception would with that you'd want your noise suppressor last just so that it filters out all of the noise from the pedals....but then again, that might mess up the chorus effect by putting it behind it....experiment with that.
okay...my post is done...goodbye.