That's a good goal to have!!! You should always have your three shakes a day. They contain all you need nutrition wise and you should never skip one because you don't feel hungry.
Its funny because we are always told to stop when we are full, but it really is important to ensure you have your 3 shakes with the minimum reccomended amount of water.
Stops your body going into starvation mode etc. Just think of it as taking medicine three times a day.That's the way I looked at it.
Good luck xx