Use less food than you normally would… While it may seem more generous to serve plates piled high with food, an over crowded plate can look less appealing than a minimalist spread. Think about how you can use the white space of the plate to frame your dish.
Use paper to add texture to plates… Lining plates with parchment or baking paper helps to add visual interest and soften the lines of your plates.
Look for contrast with backgrounds… While there are times when all white on white can be visually striking, I find I get better shots if I go for contrast. So a pale coloured food and plate gets a dark background where as a vibrantly coloured dish tends to be best with a simple white background.
Allow food to spill over naturally… Getting a bit messy really helps to add movement and life to your photographs, rather than having everything confined to plates and bowls.
Choose simple crockery and tableware… While highly decorative China and napery are beautiful on their own, they can detract from the visual impact of the food. Plain plates, especially classic white allow the food to be the star.
Emphasise the natural beauty of the food… Try and think about what it is that makes a particular dish look delicious and then serve it in a way to flaunt it. For example, I love the golden, cripsy skin of a well roasted chicken. Rather than carve the chook into individual slices with tiny slivers of skin visible, the whole bird tends to look best.