First off- hello im a new member. Ive been interested in lucid dreams for a long time and have achived them a few times in my life. Anyway I have a simple method (it may have been covered already here but im a newb so forgive me)
All I do is write the word "AWAKE" on my hand then whenever i look at my hand I look around me and ask myself if i really am dreaming. Its a good way to remind me to seriously check my reality and see if im dreaming or not.
I did this for a week or two before I had a lucid dream. In the dream i was walking around a school and suddenly realised it wasnt somewhere i would normally be so i checked my hand and instead of "AWAKE" I had a long poem written there instead.
I told a friend about this method and within three weeks of doing trying it out for himself he had his first lucid dream.

It does work although you might get some strange looks off people if you walk around with 'awake' on your hand all the time :-)