I've had tinnitus my entire life. It still bothers me to this day, but it is a symptom that will not ruin your life in any way (even though it may feel that way now), even if it is permanent.

I always manage it through background noise. Depending on your severity, this could be as simple as a computer fan, or something louder, like an air conditioner or a noise machine. On nights when I don't have the air conditioner or fan blowing I find it harder to sleep. I find that when I am dehydrated, tired, stressed, etc, it gets worse. Caffiene, alcohol, and MSG are all triggers that I avoid as well.

Much like lots of other symptoms, the more you think about them, the worse they feel.