What do you do...

beat yourself over the head with a hammer twenty times then jump on your car and drive on the freeway doing 100 on the wrong lane, and drive the car over a cliff, always works for me!!!
 
I used to have a song stuck in my head especially when I am lightheaded. It can be coming to my mind which will make me voice it out and start to sing it, this will prompt me to start playing the song with my smartphone.