I suffer from sleep apnea, which could also explain your situation. Mention your problems to a physician and they can refer you to a sleep/respiratory specialist. They might just give you sleeping pills or have you fitted for a CPAP machine.
In addition, I also find I need to distract my active mind sometimes and the sound of a fan or quiet music can help with that.

Hey, thanks to all that replied to my post.
I'll give a try to the recommendations..
One thing for sure, I don't feel alone with that problem !!

I had been awakening several times during the night to urinate. I finally went to a sleep specialist and had a sleep study. Yes, you guessed it, I have sleep apnea. This M.D. told me that the body under the circumstances of not getting good sleep will produce a substance which will increase urination. After several appointments to find out how to get the most benefit, my C-PAP was put on automatic, it goes through several pressure levels during the night to find the optimum pressure.

I have some rare insomniac nights. I listen to NPR at a low volume and tht usually puts me to sleep.

One thing you might try is lots of exercise. Your body might sleep longer without waking in order to recover.

I started to sleep much better after I started wearing a sleeping mask every night.

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I have a messed up back so I wake up several times a night to find a new position that feels better.

I have sleep apnea and I'm actually going to the clinic on the 22nd for a sleep study.
My best suggestion, check with your doctor and see if he/she can help.

I wake up a lot through the night but go back to sleep pretty quickly. SOmetimes sleep is delayed. I have a 9 hour session of a thunderstorm on my kindle and the does the trick

Do not eat after 5pm. Do not drink caffeinated beverages after 1pm. Do not take hot baths any later than 3 hours before bedtime. Warm milk is helpful if not allergic. Sleep apnea and restless leg syndrome can cause difficulty sleeping. I have to say this as well. If you occasionally have trouble with sleeping there is something called the normal stress response. If you have an extremely stressful event in your life (a car accident, losing a job, etc) exactly 10 days from that day you will have a sleepless night.

I do not have the answer. I only sleep 2-3 hours a night and that's only after taking four muscle relaxers. If I had the money I would try marijuana. I also would appreciate any suggestions. It's been over twenty years for me.