I prefer to direct seed into RW (as described by martyrprojekt) but I've used paper towels also. Sometimes the tap root does something goofy in the RW and the bean never manages to push its head out. Most of the times it does. Sometimes the paper towel gets the tap roots embedded in it, most of the time it doesn't. This may be a 6 one way, half-a-dozen the other kind of thing. Get comfortable with a way and stick it out (especially if your seeds are on the expensive side.....).