I occasionally have lucid dreams without trying to do so. They're almost always a lot of fun, basically the best sandbox game you can think of.
I've been pondering trying to trigger them, but I've been a bit spooked by suggestions that I'd have to try to learn tp distinguish dreams from reality.
I can distinguish any dream from reality, but the problem is that when I'm asleep I don't ask myself "Am I asleep?", I just continue following the dream's story. If I ever ask myself that question, or notice something isn't right (which is difficult in dreams, because what would be bizarre in reality will easily be considered normal by your brain in the dream) I will become lucid.
The article talks about flying. I often will fly in my dreams even if I am not lucid. When I am lucid, I am always able to fly.
One interesting thing you can do when you find yourself lucid dreaming is conducting experiments. You just have to remember what experiments you decided to conduct when you were awake or think of some on the spot. I found if you close your eyes and imagine something, it will be part of the world when you open them.
I found it is easier to become lucid when you are waking up, although by the time you are lucid you won't have much time left to do anything in the dream.
One thing to try (if it's worth it to you) is to get in the habit of checking if you're dreaming, even in waking life. Try to read printed text, or use an electronic device, and really pay attention to whether it works the way you expect. It feels pretty silly to do this when you're awake, until you do it really thinking you're awake and realize you're actually dreaming.
You do need to be quite studious, though-- I've had dreams where I managed to convince myself that that shifting, swirling mass of words and characters probably says something in Russian.
One of my favorites is something I call the "five finger rule." This is a mnemonic for remembering how many fingers you have. Here's how it works: Hold out your hand. Now count your fingers, one at a time. One, two, three, four, five. Five fingers.
Any time you don't get five, you're probably asleep. Obviously this assumes you have five fingers per hand in waking life :)
I've been pondering trying to trigger them, but I've been a bit spooked by suggestions that I'd have to try to learn tp distinguish dreams from reality.