no gimmicks for school...
You will be heckled on EVERY trick... so gimmicks will get caught...
the only gimmick I would suggest is a TT... but don't use it to vanish stuff... use it for switches and the like, and always build in an apportunity to ditch the TT before you finish the effect, or offer yourself to be heckled and violated.
I would suggest learning some good sleights... ones that don't leave you dirty at the end (i.e. vanish a coin... but bring it back quickly, so you are not stuck to be heckled).
Also... I know it gets a bum wrap... but the balducci is still a very effective impromptu illusion. Only do it for one or two people, in a secluded area... and perform it... once every 3 months... if not once EVER... and never again.
All you need is 2 people telling everybody... "HE FLOATED OFF THE GROUND!!!!!"... you don't need to prove it again for more people... the story will speak for itself.
you get my point? don't use gimmicks that are the focus of the trick... like pen-thru bills. I don't see a problem with bite-out quarter... as long has you have a quick switch planned, and only do it once, and never again for the same people.
Impromptu... sleights... versitile-non-focused gimmicks (like TT)... and sleights.
oh yeah... and sleights.
and again... you don't need to be performing tricks all the time... for everybody. Rely on a reputation. People talk about what they have seen you do... and if you do tricks sparingly... and NOT EVERY DAY... then you don't get caught, and you get a solid rep.