I just bought the EAS whey protein shake and I'm clueless as to how much I should take. I'm 145 pounds, 5'6 and a vegetarian. I'm pretty sure the only source of protein I get is from pulses. So, it's not much.
Assuming you are trying to build muscle and are weight training appropriately, you need 145 g of protein a day or more. Calculate what you get from your diet and augment throughout the day. Upon rising and bedtime are important times to get protein, then spread it out evenly through the day with about 6 feeding/day. if you are trying to lose fat, you will need more, cutting grains to compensate. If you are able to eat eggs, you should.