If you are in a diet rut, and feel the need to mix things up a little, you could try an alternate diet day approach. Here the theory is that significantly dropping your caloric intake occasionally helps to kick start metabolic rate. Here is an example of a very low calorie plan you could try implanting once or twice each week to keep things moving metabolically.
BR: 1 x fruit
MT: 1 x fruit
L: Tuna or salad sandwich or 1-2 sushi rolls
AT: 1 carrot + 10 nuts
D: 100 white fish + steamed greens
D: ½ cup berries + 2 tablespoons low fat yoghurt