I will try the paper trick tomorrow. I've done a different one quite efficiently though!
1. Tie a small, weighted object (i find iron works best) to the end of a string.
2. Hold the string in your fingers so it hangs about 8-12 inches down.
3. Concentrate on the object, and visualize it swinging back and forth, while thinking in your mind "YES" as confidently as you can.
4. Thinking "NO" and visualizing it going in a circle makes it go in a circle.
Once you're experienced enough, you can do it without the YES and NO, but they make it easier, or so it seems.
I once moved a similar pendulum from a few meters away and was controlling the spin of it. Really creeped out my freinds who were with me. I haven't been able to do it again though...