There's something to be said for a simple green salad. I tend to like iceberg or cos lettuce best, and add any number of the following:
~ red /green capsicum
~ avocado (not negotiable!)
~ red onion
~ cubed fetta/tasty cheese (or soy cheese)
~ black olives
~ snow peas
I generally don't have bottled salad dressing, so just mix up one part olive oil with one part balsamic vinegar to serve. Yum!