I've been actually getting really good at these things myself. What I do is I picture my energy swirling around me when I'm in a meditative position. Then I begin to think of my aura in halfs, positive and negative. Putting my hands in my lap, I think of the magnetic energy condensing into the palm of my hands, swirling violently into a point. Like a black hole. Thats how I practice the creation of gravitational anomalies