Sunnah of the Prophet - Eating what is on one's plate

The Prophet (pbuh) told the Companions (ra) to finish what is in their plates, and said,

“For you do not know where in your food the blessing is.”

[Muslim]

SubhanAllah, nowadays many of us waste food and fail to finish whatever is on our plate, while most people in the world do not even have food to eat. We should keep this in mind and try to finish our food- if we feel we are full, we should learn for next time not to fill our plates so much, and if we are eating out and have no choice with regards to the quantity, we should take the leftovers as takeaway and either eat it later or give it to someone who will.