Do you have a food scale? I have two!

One is not very good, but the other one my sister found in her kitchen and she wasn't using it, so we have it and it's GREAT! I use it to weigh chicken breasts ALL THE TIME! And I use my measuring scoops and tablespoons/teaspoons religiously! That is the best way for me to be able to really monitor my portions.
I am having oatmeal for breakfast and it's keeping me very full through the morning. We ALWAYS have a salad with dinner, usually mixed greens (Earthbound Organic has a GREAT prewashed/bagged variety of salad greens). We also have grape tomatoes, cucumber, red or green pepper and carrots on our salad. I even use those cocktail onions to pep my salad up, and sometimes I'll have 6 black olives on the salad. Kraft has some GREAT light dressings, "Light Done Right", and we measure out two tablespoons per salad. It really does the trick, that is more than enough to cover our salad and make them taste yummy!
We almost always have steamed broccoli for dinner too. If I cook up chicken breasts and broccoli, we'll either have broccoli with a small shake of parms. cheese (Kraft brand) on it and the chicken will have a measured amount of BBQ sauce OR we'll mix the chicken and broccoli together and use a measured amount (tablespoon or two) of Lawrys Teriyaki & Ginger marinade to flavor it.
You can do it! If you get hungry between meals, try to spread your points out through the day into 5 smaller meals instead of just the traditional B L D.
For us, eating that salad before dinner was the key. It really fills us up. I thought my husband would get sick of salad every night before dinner, but he LOVES it! By the time we finish our salad, we're almost full, so eating the chicken and broccoli (or cauliflower depending on what I cook) just tops us off! Also keep drinking that water!
Last night I was watching some show on the Style network and they had WW representative on. She said to divide your plate in half and fill one half with veggies (they showed a mix of cauliflower, broccoli, red peppers, etc. I think) Then the other half was divided in half, and each of those was filled with a protein and carb (chicken breast and potato). Good luck!