Do not submit copyrighted material unless you are the owner.
Ask permission before submitting a photo of someone else (they might get mad).
Make sure your photo is at least 500 pixels wide and include any relevant information like: Who the person in the photo is, a link to their blog/site, name of the dish, name of the restaurant, link to the restaurant’s website, location, etc.
DO NOT SUBMIT THE SAME PIC MORE THAN ONCE. IT IS MOST LIKELY IN QUEUE. SO CHILL.