I have to say out of all the tricks and tips I've tried nothing has brought me longer Lucids than the "Rubbing Hands" technique. I maintained a Lucid which seem to be the whole REM period (45 minutes). True, during the Lucid dream I keep speaking to myself which helps but the HANDS kept it going while I was not speaking to myself. While your lucid keep rubbing your hands together rapidly. The sensation of touch relayed to the brain keeps you very grounded in a lucid dream.

Again keep speaking to your self, "I am aware that I dreaming!"

Cheers!