Eat whole foods. It's amazing how filled you'll be eating just a salad. And I don't mean lettuce. Salad = LOTS OF VEGGIES, nuts, even fruit. Make a bowl full bigger than your head, make an awesome dressing (my favorite at the end) and just enjoy your life of eating healthy, nutritious food.
Carrot slices or julienne (fresh, not bagged)
Grape or cherry tomatoes halved
Cucumber sliced or chunked
Green onion "cubed" :P
Craisins or dried cranberries
Pecan pieces or halves
Avocado if you like it, cut small. Not too ripe.
Apple chunks (you pick sweet, tart or in between)
This salad probably wouldn't take it well, but I like to use green olives (in brine with pimento)
My favorite dressing:
Fresh pressed garlic - ~5 cloves
Lemon juice - 2 Tbsp
Water - 2 Tbsp
(some use Olive oil. I don't think it is necessary at all)
Let this sit for a few minutes. I like to make it before I prepare the salad.
If you make a HUGE salad this way, you will be stuffed to the rafters with highly nutritious foods, won't feel heavy or bloated, will not get constipated, will have good energy and sleep well (assuming you don't have a sleep disorder). And you WILL lose weight, but not too fast and not too much. Our bodies are smart.
Good luck, and enjoy your meals.
[edit: I forgot to mention that the lettuce in the salad should be less than half of the bulk, or volume, of the salad. Not too much, but it is important to have dark leafy greens.]