1- Ghusl (taking a bath): One of the good manners of Eid is to take a bath before going out to the Prayer. It was reported that Sa`id ibn Jubayr said: “Three things are Sunnah on Eid: to walk (to the prayer-place), to take a bath, and to eat before coming out (if it’s Eid al-Fitr).”
2- Eating before coming out: One should not come out to the prayer-place on Eid al-Fitr before eating some dates, because of the hadith narrated by Al-Bukhari from Anas ibn Malik who said: “The Messenger of Allah (peace and blessings be upon him) would not go out in the morning of Eid al-Fitr until he had eaten some dates… and he would eat an odd number.” On Eid al-Adha, on the other hand, it is recommended not to eat until after the Prayer, when one should eat from the meat of one’s sacrifice.
3- Takbir on the day of Eid: This is one of the greatest Sunnahs of this day. Al-Daraqutni and others reported that when Ibn `Umar came out on Eid al-Fitr and Eid al-Adha, he would strive hard in making Takbir until he reached the prayer-place, then he would continue making Takbir until the Imam came.
4- Congratulating on one another: People may exchange congratulations and good greetings on Eid, no matter what form the words take. For example, they may say to one another, “Taqabbal Allahu minnaa wa minkum (May Allah accept, from us and from you, our good deeds!)”.
Jubayr ibn Nufayr said: “At the time of the Prophet (peace and blessings be upon him) when people met one another on the day of Eid, they would say, ‘Taqabbal Allahu minnaa wa minka.’” (Ibn Hajar)
5- Wearing one’s best clothes for Eid: Jabir (may Allah be pleased with him) said: “The Prophet (peace and blessings be upon him) had a Jubbah (cloak) that he would wear on Eid and on Fridays.” Al-Bayhaqi reported that Ibn `Umar used to wear his best clothes on Eid, so men should wear the best clothes they have when they go out for Eid.
6- Changing route on returning from Prayer-place: Jabir ibn `Abdullah (may Allah be pleased with him) reported that the Prophet (peace and blessings be upon him) used to change his routes on the day of Eid. (Al-Bukhari)
Allah Almighty knows best.
Source: Excerpted, with slight modifications, from, www.islamqa.info