what tricks do you perform when your out and nothing is on you... what do you perform? Or do you keep things on you such as rings or rubberbands so you can always do those such tricks? ??
I recommend On the Spot by Gregory Wilson.
Plenty of effects using simple, everyday objects that you normal carry around or that your spectator has.
I normally have a ring on me and try some routines with that or maybe something like coin bends and pulse stops.