Wiring a single effect in regular true-bypass fashion (without a battery):
Wiring an effect that contains a separate add-on/boost circuit so that the main switch toggles the entire effect on and off, and the add-on/boost switch optionally toggles in or out the add-on/boost circuit only when the main effect is engaged:
Wiring two effects into one enclosure where you want each effect to be completely separate from the other. They’re basically two effects connected in series that happen to share the same enclosure:
Wiring an effect containing two separate circuits where one switch selects which of the two circuits that are active and the other switch toggles the active effect on or off like normal:
Update (03.04.2012): How I usually wire a buffered effect (this kind of depends on the design of the buffered circuit in question though).