You really don't need a recipe for salad...just put things in it you like!
Start with the greens...bagged mixes are fine if you're going to use them right away, but I've found they don't keep long. Besides iceburg lettuce, we frequently buy Romaine, spinach, or occasionally that beautiful Boston lettuce in the little box.
Next, choose the vegetables you like. I always want tomatoes on my salad, but that's just me. In addition to the ubiquitous cucumber, radish, red onion, grated carrot and red cabbage, other choices are raw broccoli and caulflower florets, haricots verts, snow peas, roasted red peppers, mushrooms, artichoke hearts, olives, hearts of palm, frozen peas, beans sprouts, water chestnuts, bamboo shoots, and more.
Then add some protein. Bacon, chicken, turkey, steak, shrimp, crab meat, scallops, pepperoni, summer sausage, garbanzo beans, nuts and cheeses...anything you like. If you're using a strong cheese, like blue, don't go overboard on other strong flavored ingredients.
Croutons are a good crunchy addition, but make your own. It's so easy, and they're much better.
Then choose your dressing...bottled is fine, or make your own. Vinaigrettes are easy, or you can make great creamy salad dressings starting with mayo or Miracle Whip. Add crumbled blue cheese, Italian dressing mix, catsup or chili sauce, Knorr spinach dip mix...use your imagination. A little squirt of lemon juice helps the flavor of any dressing, especially if you use mayo.
Here's one of my favorites: marinate fresh sliced mushrooms and canned artichokes in Italian dressing for an hour or so, and use that as a dressing. Add to the salad good olives, pepperoni and grated parmesan or pecorino romano.