Just relax. Accept the vibrations, or whatever else the SP causes, but don't dwell on it. If it helps, recite what you want to do in your head. I usually recite "I will have a lucid dream. I will fly above the clouds" repeatedly. Eventually, you will start to slur, which means that you are really relaxed if your thoughts are slurred (Mine usually turn into "I lill wave a ducil meard". Just keep repeating it, until you start to see something. I did it last night, and I started to see a chalkboard. Then a classroom. DON'T PANIC. Stay calm, rub your dream hands together until the dream becomes stable. You have just WILDed.
Happy dreaming.