Ziggy is on the money along with the other guys that posted. Take a look at this 1961 barber excerpt in the SRP Wiki here. The last couple of pages deal with stropping. The suggestion to practice flipping the blade between the tip of the thumb and forefinger without bending the wrist is a good one.

You also might want to practice the motion on a belt with a butter knife in the beginning. It is a bummer to nick a good strop when you're learning..... or anytime. Your buying the Dovo will pay off in results and don't worry about finishing the problem areas with your Wallmart razor. Took me two or three weeks to put the DE away and I haven't seen it since.