Another great addition to a salad is a little crunch. I am partial to pine nuts, but the secret to making them taste great is to toast them lightly in a dry skillet before you add them to your salad. In fact, most nuts benefit from a quick dry toasting as it brings out the flavor from the oils in the nuts and you can't beat the wonderful aroma.
Go ahead - make a salad tonight with your own vinaigrette. Pick an oil, then pick a vinegar or other acid (red wine vinegar, white wine vinegar, sherry vinegar, lemon juice) and I promise you'll never return to bottled again!