Don't be afraid of variety. There are no magic meals that are the "only way" to lose weight. You just have to find other meals that are similar in calorie content and are still satisfying. I'm a huge fan of salads because you get the filling and healthy fiber, nutrient dense vegetables and an overall low calorie meal. I have one salad every day, but I know not everyone can do that. If at all possible, find ways to change it up (you can go mediterranean, mexican, garden, or asian with different ingredients/dressings), or have a smaller salad with something else, ideally protein for some variation. Even if it isn't every day, try to keep it up at least 2 or 3 days a week. Your body will thank you.

Anyway, in lieu of salads, try soup, a small brown rice and chicken dish, Boca burgers, low fat/low cal tuna salad, stir fry, grilled chicken or fish, steamed broccoli/veggies... you really do have a lot of options.
Snacking after dfinner isn't patently bad, but keep in mind that anything your body doesn't burn it will store (typically fat) and at night your metabolsim slows. If you have to snack, try to keep it limited to protein. A hard boiled egg is good, cottage cheese is excellent, sugar free popcicles, sugar free jello, a few nuts, or jerkey would all be okay. Just keep calories to a minimum at night and avoid high GI carbohydrates, and carbs in general if you can help it. Really try not to eat one or two hours before bed.
Hope that's helpful.