Herb Vinegar: Here are some combinations that I have found to be quite tasty:
Lemon thyme, lemon balm, lemongrass, and lemon peel.
Summer savory, basil and minced garlic.
Opal basil, chives, marjoram, and oregano.
Dill, lemon thyme, rosemary, and minced garlic.
Nasturtium, lavender, peppermint, and minced ginger root.
Basil, chives, chili pepper, and garlic.