Avoid alcohol, caffeine and tobacco if you are a sufferer of tinnitus. These substances are known to act as nerve stimulants. Tinnitus is often caused by over-stimulated nerves sending a confused message to the brain, so adding to this is naturally something you should avoid. Removing these will also help your overall health, so their is no reason not to.
Many sufferers of tinnitus find it helpful to reduce the stress in their lives. Stress releases chemicals into your body that cause stimulation to your nervous system. Reducing this in your daily life can lessen the symptoms you experience or eliminate it completely. Stress itself could even be the cause of your tinnitus.