Bob your wasting your money if your mixing up a shake with 100g in it. Personally you should be getting most of your proteins from whole foods over the course of 6-7 meals.
When more than 30-35 grams of whey is used at one time, it is absorbed too quickly, and what the body cannot assimilate for tissue repair is oxidized for energy. If you don't work it off, it ends up around the old waistline. The latest research has found that more whey protein is oxidized for energy than was first thought. Most people should limit their intake of whey at a single sitting to approx 30 grams. Again these numbers are quite arbitrary, and everyone will respond differently. Mixing whey with milk, adding peanut butter or flax will probably help some, though it won't help as much as some people might think.
The best bet is to invest in a blended protein, or at least some casein protein to add in with the whey, as this will provide a slower digestion rate and will increase the npu (net protein utilization) of the protein. Just as a side note recent studies have found that the npu of whey is actually lower than that of casein and egg white protein.
Last, but not least, barring post-workout, all protein powders are inferior to whole food proteins and are simply a matter of convenience. The key to continuous muscle growth is to keep the body anabolic throughout the day by maintaining a constant positive nitrogen balance. Too much emphasis is placed on post-workout nutrition, and not enough on keeping the body anabolic all day long.
The most important thing to remember is to drink enough water to aid the kidneys in the processing of this much protein. A person doing steroids will see a difference in gains when upping the protein intake to 2-2.5 gms per lb. 1 to 1 1/2 gms is plenty for a guy just starting out and taking nothing but protein powder and creatine.