What's the best sleeping pill?

I have had trouble sleeping all my life. Now, in my older years, it's much worse. I do everything I have ever heard of to promote a good night's sleep: Exercise (I swim steadily for an hour a day most days), going to bed at the same time, don't watch TV, dark room without flowing night lights or lit up clocks, deep breathing, mind on positive relaxing ideas etc.
I have spent my life trying to avoid sleeping pills except for very occasional over the counter medications like Ylenol PM when I've been in pain. I fear addiction. But I've come to the point where I can't function anymore without more sleep.