Sar5, can goods can typically last beyond their expiration date as long as a few conditions are met:
1st - they are stored in a cool, dry, and dark place.
2nd - the can doesn't show any signs of rust.
3rd - the can doesn't show any signs of swelling.
"Best By" dates are to gaurentee maximum nutritional benefit and flavor. After the "best by" date, most food is still safe to eat, but the nurtitional value and taste start to decline.
I use a modifed version of the SAS method of testing questionable food:
A) Smell.
B) Little touch - to the skin on the back of your hand. Wait for bad reaction.
C) Tongue touch - dab some on your tongue. Wait for bad reaction.
D) Nibble - take a S M A L L bite. Wait for bad reaction.
E) Bite - take a normal bite. Wait for bad reaction.
F) Go for it.