White balance is key
Ensuring that your white balance is spot on will make the difference between a drool-enducing photo, and one that looks like you'd rather skip dinner and move on to dessert. If you don't get the white balance right in-camera, a little slider action during post-processing by warming up or cooling down the color temperature will help. For example, photographing on an overcast day with pale light can wash out the colors of a dish you want to be bright. You can warm up the white balance to make it look like a summery day, adding heat and vibrance to the food. However, be careful not to go overboard with this trick. Use it like you would any seasoning — in moderation.