also deburr, sharpen, and de-tune your edges. It will eliminate any potential rust spots. Also make sure when storing the board that you don't stuff on in or leaning against it as this can warp the board.
is it better to lay it flat, on its edge, or does it matter? i was thinking that if you lay it flat, gravity may cause it to flatten out slightly. i was planning on putting mine in my travel case to protect it and set it on the edge.