Hypersmurf
Moderatarrrrh...
One example off of the top of my head I can give is to cast a few Delayed area effect spell spells infront of a creature you bound within a Planar Binding spell, set to go off in 5 rounds certainly motivates the creature to accept your bargain, eh?
Out of curiosity - why is "Accept the bargain or my delayed Cone of Cold will get you!" more effective than "Accept the bargain or I'll cast Cone of Cold on you!"?
-Hyp.