The last few times I've become lucid in a dream it has been very lame, and after becoming very excited I start paying attention to my heartbeat. After a few seconds I blacked out. It doesn't seem like I actually woke up immediately after blacking out though.

It's funny...once I became lucid while sitting in the passenger's seat of my dad's car. Once I knew it was a dream, he just completely forgot how to drive and started drifting off the road. I had to help him. Then after a few seconds of that, the dream ended.

Point is, could anyone just give a few tips on how to take control of a dream while still involving your imagination enough to avoid blacking out...Thanks in advance!