Purim is one of those Jewish holidays that is somewhat overlooked by many, even by those of us who happen to be Jewish. If you've neglected to celebrate Purim in the past, get on it -- find a reading of the Book of Esther, shake your groggers, and go out and get bombed. Yes, you heard us right -- get bombed. Accoring to Judaism 101, on Purim
[w]e are . . . commanded to eat, drink and be merry. According to the Talmud, a person is required to drink until he cannot tell the difference between "cursed be Haman" and "blessed be Mordecai," though opinions differ as to exactly how drunk that is. A person certainly should not become so drunk that he might violate other commandments or get seriously ill. In addition, recovering alcoholics or others who might suffer serious harm from alcohol are exempt from this obligation.
Bottom line is: have fun, but don't break any laws, Jewish or otherwise. Purim is also the time to eat hamantashen, triangular cookies traditionally filled with poppy seeds or apricots (we're partial to the apricot ourselves). The cookies are shaped in the form of the hat of Haman, the bad guy in the Book of Esther. The Chowhounds recommend Moishe's on 2nd Avenue between 6th and 7th, as their hamantashen headquarters, and we agree.
More on why we are required to get blotto on Purim from Chabad.org.
A collection of hamantashen recipes.