This is a lot to read, but this should all help:

Hmm that's really interesting. It sounds like you're successfully completing WILDs through the sleep vibrations stage. This is the stage where you feel intense vibrations, the feeling of falling, or moving rapidly. This stage is right before you actually "fall asleep."

It sounds like you are saying that you remain conscious this entire time? That is, you never lose the awareness that you are falling asleep?

If this is correct, then you are doing a WILD. There are many different ways to complete a WILD- Stephen LaBerge even mentions ways close to yours in his book, "Exploring the World of Lucid Dreaming." In the section on WILDs, in LaBerge's book, he says to complete a WILD, "you can focus on hypnagogic (sleep onset) imagery, deliberate visualizations, your breath or heartbeat, the sensations in your body, your sense of self, and so on."

I've never heard of listening to the buzzing... but it seems to fit in perfectly with everything he lists. I'm pretty sure I know what you're talking about and I might try it tonight.

Hypnagogic Imagery are the things you see before you actually enter the dream. Hypnagogic imagery is in between dreaming and just imagining something in your head like you could right now if you closed your eyes and tried.

Staying in a dream is simple! Just spin in a circle in your dream! Yup, just stand where you are in the dream... and start spinning in a circle. Not running in a circle, but turning in a circle. The way this works is also simple...

When you're asleep, your actual body is lying still in bed, but your dream body is not. By spinning in a circle in your dream, you further intesify the gap between your dream body and your actual body. Basically, it's harder for your mind to switch over to your actual body if your dream body is spinning.

If spinning doesn't work, try rubbing your hands together in the dream. This also creates a sensation that will help hold you in the dream, just as spinning creates a spinning sensation that will help hold you in the dream.

If you manage to successfully enter a lucid dream again, you should probably just focus on staying in the dream. In other words... Spin around! Rub your hands together!... then you can look around for a little bit... dont get carried away and try to fly or anything just yet... instead, remain calm... look around, and then spin and rub your hands some more. Just keep doing this and focus on STAYING IN THE DREAM. Make that your objective. Once you do that in a couple of dreams, then you will get better at staying dreaming for a long period of time, and then you can do fun things like flying! Or turning into a bear! Or shooting missiles from your hands!

Best of luck!