Practice good manners when you eat your meals; wash your hands before and after meals; don't talk while you are eating or drinking; don't waste food etc..

The hadith narrated by Suwaid bin An-Nu'man tells us about the etiquette of eating that was practiced by the Prophet Muhammad ﷺ and his companions during their journey to Khaibar. They ate Sawiq, which is a type of food made from wheat flour, with water as their meal. After they finished eating, they washed their mouths before offering prayer. This teaches us that we should always practice good manners when we eat our meals; washing our hands before and after meals, not talking while eating or drinking, not wasting food etc., so that we can be mindful of Allah's blessings upon us. We should also remember to thank Allah for His bounties after every meal by saying 'Alhamdulillah'.