Another Sleepless night.

It's another night, another night that i haven't been able to find rest or sleep, much less peace.
I've tried many things, such as, reading, trusting in the lord, going to bed early, doing computer exercising, listening to music, counting sheep, thinking, sleeping pills,and the list goes on and on and on......
I wonder why? when i was younger, i used to sleep so well, maybe cus i was a child then.
I wish i could go back to those days when i was a deep and peaceful sleeper, with sleeps always filled with strange yet fun dreams, and afterwards waking me up with excitement every morning. Now i no longer hardly ever dream, and if i do, i don't remember it much.
Maybe my life needs more excitement, not saying that it was more exciting when i was younger. Or maybe i need to exercise more, or eat more, or eve just stop thinking and bore myself to sleep, but there's so much to think about i just can't stop thinking once i start.
Oh Lord help me, what shall i do? I'm thankful for all the advice that i received from lots of people, and i've tried them all, but it just doesn't work for me.
I wonder why. Maybe it's because i think it may not work because i think so, or maybe i'm just afraid of stuff.
Right now, all i want is peace and a restful night, with peaceful yet exciting and fun dreams, and being waken up in the morning knowing that in fact i had slept very good, and feel happy for the day.