It is a popular custom to make noise when the name of Haman is mentioned during the reading. It is very important for the reader to stop reading while the noise is being made and not continue until the noise ends. The reading of the Megillah can last anywhere from 30 minutes to an hour and a half, it just depends on how long the noise lasts every time Haman's name is pronounced. On the day of Purim all Jews are required to send at least two gifts of food to at least one other Jew. The two gifts should be different foods, like an apple and an orange.
Drinks are also good.
Ideally, the gifts should be food or money which the poor can use for Purim. The Purim Seudah - Festive Meal Seudah means feast. We are required to make a feast during the day of Purim. Some people also have a meal at night, but it is not a Commandment. The bulk of the Purim Seudah must be eaten before nightfall.