Megan Asked: How can I start lucid dreaming?

It's not as fun as it sounds! I used to suffer from really terrifying nightmares and one night I just really thought about how it was just a dream and then I realized.. when dreaming .. that I was awake. This was when I was about 13 and now I am 22. It really sucks though! Like last night I was falling asleep and started having a nightmare bout a guy trying to kill me.. I realized I was just dreaming and then to get out of it I just really think about my room and the surroundings and then I feel myself going back to the real world. I hate it tho.. because you feel paralysed for about 10 seconds whilst this happens!