Get into the habit of weighing or measuring *everything you eat* unless you absolutely *know* what the wt/measure/pts are. I keep several measuring cups, measuring spoons, and a small postal scale out in the open, easy to get to, in the kitchen.
I've been on WW almost a year, have lost 35 pounds (I only need to lose about 4 -5 more), and have written down every bite I have eaten in that time. I believe that is a major reason that I've succeeded. Make up your mind that you are NOT going to kid yourself about portion size - not once, not ever.
I did not join WW, but my husband is a member, we have done this together, and I have had *major* support from family and friends.
And GOOD LUCK - you can do it!