I'm presently on my pre-op diet of 4 protein shakes a day and 1 meal that is 400 calories or less. To make sure the liver shrinks (which I'm sure it has), are there any recommendations as to what I should eat these next few days to ensure the liver is small enough? Surgery is Jan. 6th.

Protein and low carb!

Double check with your nutritionist, but most people do one low carb. low fat, high protein meal in addition to the shakes. So a green salad with grilled or broiled chicken and either olive oil & basalmic vinegar or a light dressing would do well. Fill the salad with good, crunchy veg so you'll feel full.