The Takbeer is legislated from the dawn of the day of Arafah and during the Ayyaam At-Tashreeq (i.e. 11th to 13th Dhul Hijjah) to Asr time on the 13th of Dhul Hijjah. Allaah (The Most High) said: [وَاذْكُرُوا اللَّهَ فِي أَيَّامٍ مَّعْدُودَاتٍ ]— ”And remember Allah during the appointed Days.” [Soorah Baqarah: Ayah: 203] The manner in which the Takbeer is performed is: [الله أكبر الله أكبر، لا إله إلا الله، والله أكبر الله أكبر ولله الحمد]. It is prescribed for the men to raise their voices with the Takbeer in the Masaajid, the houses and after the five daily obligatory prayers. This is done to exalt Allaah and to manifest singling Him out in worship and thanking Him.
Bath on the day of Eed
One takes a bath and only men are to wear perfume. The men should also wear their best clothes but neither going into extravagance nor dragging their garments below their ankles and shaving their beards.
Eating From the Eed Sacrifice:
One eats from the Eed sacrifice, because the Prophet (sallal-laahu-alayhi-wasallam) did not use to eat until he returned from the Musalla and ate from the Eed sacrifice. [Zaadul Ma-aad: 1/441]
Walking to the Musalla (i.e. place of prayer)
One walks to Musalla if that is easy. The Sunnah is to pray Eed in the Musalla except if there is an excuse not to do so, such as rain etc. It is also recommended to stay for the Eed khutbah and to supplicate for the Muslims. Likewise, one takes a different road whilst returning from the Eed prayer, because this was an action of the Prophet (sallal-laahu-alayhi-wasallam).
It is permissible to greet one another after Eed, because this has been established from some of the Sahaabah. Shaikh Uthaymeen (rahimahullaah) said that there is no particular defined Eed greeting; rather this is left to the people as long as such greeting does not involve sin. Likewise, he (rahimahullaah) said that there is no harm in shaking hands and embracing one another because these are affairs the people have taken as a custom these days and they are not done as acts of worship or as a means of getting close to Allaah.
And Allaah knows best
This article paraphrased from an article compiled by Ustaadh Abu Usaamah Sameer Al-Jazaa-iree (may Allaah reward him) http://www.ahlos-sunnah.com/matwyat Also see link: www.sahab.net: see link: http://www.sahab.net/forums/index.php?showtopic=132870