If you do decide that your going to use protein suppliments or shakes, then go for whey protein, as soy protein does not contain the full list of amino acids you need to absorb it, find a product with the highest amount of protein (at least 80% per 45 gram portion) and contains no sugars or artificial sugars as many do.
The recomended daily amount is 46 grams, and remember this is in addition to eating a protein rich diet not as an alternative.