People tend to feel like salads are boring, which is why they're not as psyched to have them for lunch. Make yours enticing by adding a variety of colourful veggies, fruits, protein, healthy fats, and cooked grains and veggies. If you just sit down to a bowl of lettuce, cucumber, and carrots, you're more likely to reach for more food (pizza?!) soon after.
Also, switch up how you cut your veggies. If you usually slice carrots, grate them. If you usually dice cukes, make ribbons. You want to look forward to this salad so it's emotionally satisfying, so make it exciting!