Eating
The Apostle of Allah 
then said: When one of you eats food, he should say: O Allah, bless us in it, and give us food (or nourishment) better than it.
Hadith - Abu Dawud, Narrated Abdullah ibn Abbas
Don't lean on something while eating
Hadith - Sahih Bukhari 7:310, Narrated Abu Juhaifa
Allah's Apostle said, "I do not take my meals while leaning (against something)."
Eating does not nullify wudu
Hadith - Sahih Bukhari 7.316, Narrated Ibn Abbas
The Prophet ate of the meat of a shoulder (by cutting the meat with his teeth), and then got up and offered the prayer without performing the ablution anew. Narrated Ibn 'Abbas: The Prophet took out a bone with meat on it from a cooking pot and ate of it, and then offered the prayer without performing ablution anew.
Hadith - Sahih Bukhari 7.365, Narrated Suwaid bin An Numan
We went out with Allah's Apostle to Khaibar, and when we reached As-Sahba', the Prophet asked for food, and he was offered nothing but Sawiq. We ate, and then Allah's Apostle stood up for the prayer. He rinsed his mouth with water, and we too, rinsed our mouths. Narrated Suwaid; We went out with Allah's Apostle to Khaibar, and when we reached As-Sahba', which (Yahya says) is one day's journey from Khaibar, the Prophet asked for food, and he was offered nothing but Sawiq which we chewed and ate. Then the Prophet asked for water and rinsed his mouth, and we too, rinsed our mouths along with him. He then led us in the Maghrib prayer without performing ablution again.
Lick your fingers before wiping them
Hadith - Sahih Bukhari 7.366, Narrated Ibn Abbas
The Prophet said, "When you eat, do not wipe your hands till you have licked it, or had it licked by somebody else."
Eating when it's time for Salah
Hadith - Sahih Bukhari 7.374, Narrated 'Aisha
The Prophet said, "If the Iqama for ('Isha') prayer is proclaimed and supper is served, take your supper first."
Silver or gold cups or plates
Hadith - Sahih Bukhari 7.337, Narrated Abdur Rahman bin Abi Laila
We were sitting in the company of Hudhaifa who asked for water and a Magian brought him water. But when he placed the cup in his hand, he threw it at him and said, "Had I not forbidden him to do so more than once or twice?" He wanted to say, "I would not have done so," adding, "but I heard the Prophet saying,
"Do not wear silk or Dibaja, and do not drink in silver or golden vessels, and do not eat in plates of such metals, for such things are for the unbelievers in this worldly life and for us in the Hereafter."
Is okay to first ask what the food is first?
Hadith - Sahih Bukhari 7.303, Narrated Khalid bin Al Walid
That he went with Allah's Apostle to the house of Maimuna, who was his and Ibn 'Abbas' aunt. He found with her a roasted mastigure which her sister Hufaida bint Al-Harith had brought from Najd. Maimuna presented the mastigure before Allah's Apostle who rarely started eating any (unfamiliar) food before it was described and named for him. (But that time) Allah's Apostle stretched his hand towards the (meat of the) mastigure whereupon a lady from among those who were present, said, "You should inform Allah's Apostle of what you have presented to him. O Allah's Apostle! It is the meat of a mastigure." (On learning that) Allah's Apostle withdrew his hand from the meat of the mastigure. Khalid bin Al-Walid said, "O Allah's Apostle! Is this unlawful to eat?" Allah's Apostle replied, "No, but it is not found in the land of my people, so I do not like it." Khalid said, "Then I pulled the mastigure (meat) towards me and ate it while Allah's Apostle was looking at me."
- Do not eat anything haram
- If dinner is ready when the Isha Iqamah is called, delay the salat until after eating.
- Do not use all or primarily real gold or silver eating utensils to eat with.
- When eating food prepared by others, such as when a guest, it is a recommended act to ask or be aware of what the food is before eating it, in order to avoid eating anything haram.
