Here are some things we put in our salads:
Homemade Sourdough Croutons
Feta or Gorgonzola Cheese
Real Bacon Bits
Al Dente Pasta
Salad dressings also need to vary to keep salads from becoming boring. It's easy to just put out the olive oil and balsamic vinegar. Sometimes I make an Apple Cider Vinegar Dressing from http://www.thenourishinggourmet.com/, or a sweet Garlic Mustard Dressing, and on occasion I make what we call Friday Blue Cheese Dressing.
What do you put in your salads?