what can I do if haven't slept well during the past few years, have some
weird and homo dreams and don't wanna take sleeping pills my whole
life? I may wake up few times along the night (and then catch up new
sleep) almost every night. I'd wholeheartedly appreciate your help.
Thanks.

This is one of the nights I am also awake.  It doesn't happen very
often any more.  Let me share with you what I've done in the past that
works.
1.  Get up early in the morning - I mean really early like 5:00 A.M.
and either go to a gym and exercise or get outside (if the weather
permits) and ride a bike, go for a brisk walk.  Get your body moving
and get the oxygen flowing.
2.  Eat properly during the day - stay away from caffeine and try a
low or controlled carb diet.
3.  Go to bed early - read a book if possible to help you fall asleep.
I find that rising early and exercising gives me a lot more energy
during the day and helps me to fall asleep soundly during the night. 
I didn't exercise today or yesterday which is probably why I am awake
at this early morning hour.

I think the following websites will help you immensely. I no longer
have sleeping problems after following the suggestions in the articles
below.

http://www.cnn.com/HEALTH/library/HQ/01387.html

http://www.goaskalice.columbia.edu/1569.html

http://www.dartmouth.edu/~acskills/docs/10_sleep_rules.doc

http://www.helpguide.org/life/sleep_tips.htm

http://www.webmd.com/content/article/80/96409.htm?z=1836_00000_4052_hz_04

http://www.everythingfurniture.com/better-sleep-tips.html

I hope this helps.