Congrats of the LDs! Well done.

As far as maintaining lucidity goes, as soon as you realize you're lucid, stop whatever you're doing and take a few breaths. I like to lean against a wall and look at my hands to stabilize the dream and make sure I don't get too excited. When you feel ready, then go and do whatever you want. Just give yourself a minute to calm down and stablize before jumping right into it. That's what works for me anyway.