From Chabad.org, the official website of the Orthodox Hasidic Chabad-Lubavitch movement, this thorough How-To Guide for Purim contains a brief summary of the story of Purim and everything you need to know in order to fulfill the observances of the day, including hearing Megillat Esther, delivering Mishloach Manot (food gifts), enjoying a Seudat Purim (festive meal), and giving Matanot L’Evyonim (gifts to the poor). It also provides information about some of the commandments associated with Purim that occur before the holiday itself, as well as links to other helpful Purim resources.