I can tell you guys something alternatively that works really well for me and causes "goose bumps" and the tingly cold feeling that feels awesome, as well as another method that makes your mind expand and have very creative dreams.

1st method:

Find some music that you really really like. Make sure that you are hydrated well. Quickly drink a caffeine beverage that is the equivalent of 2 or 3 cups of coffee(doesn't need to have sugar in it). Get the air conditioner on so that is is pretty cold. Now listen to your favorite music. It can be fast music or slow music, but it has to be music that HAS SIGNIFICANT MEANING to you.

When I do this it is an amazing experience I have so many goosebumps, my whole body tingles, I feel better, I feel like powerful and calm at the same time. It is like a pulsing goosebumpy feeling. I can feel something in my brain pulse this nice feeling through my body, while at the same time I feel very focused.

2nd Method:

If you also want to try this other way, eating about 500 calories of meat before you go to bed. That will stimulate your brain. The chemical reactions in your body happening in your stomach while you sleep send signals to your brain and you will have crazy creative dreams or nightmares. This works for me everyday if I do it. I have vivid dreams I remember very well. I remember them so well I can recall what my dreams and or nightmares were weeks/months/years later. Sometimes I even have the same recurring dream/nightmare when I do this. Spicy food also works, I find that something with meat works best though.