early in the week try to control your carbohydrate intake. stay away from cheap carbs like sports drinks and lots of bread. good sources of protein like boiled/poached eggs and baked/grilled chicken. fruit and fresh vegetables are also good early in the week. as the week progresses scale back on your portions, and control your water intake depending on how low you are going. later in the week switch from fresh to dried fruit, it tastes awesome and is low weight.

also, while running is an ok way to cut weight, i would suggest finding a workout partner to drill with. I used to do switch/reswitch, takedown, and stand up drills after practice with great success. they work all of your muscles and aren't as mind numbing as running is. I also jumped lots of rope the day before weigh in.