The most natural way to get it to attach is to position the thing you want it grown on so it is partially above the surface. You can then just drape it loosely so it is in the water deep enough that the top portions stay in contact with the wet exposed surface (the canopy keeps in moisture and there is normally some wicking in wooden surfaces, keeping it wet). I'm not a fan of the way it grows when tied to something. Prettiest way for me personally, is to grow them from individual leaves, the pattern they form over the surface is very intricate and a really clever design. I'd keep them close to the light while waiting for them to grab hold.