I know its tempting to just start cutting the wood but its good to have a design so you know where you going with your piece. Draw a couple of sketches on some paper and when you think you got it, transfer it to your wood. This was my design after I cut it. notice how i drew the bowl at a sharp angle? This allows the pipe to stand upright when its hanging your mouth.
after you design it give your pipe a rough cut around the general area you made with your maker. don't cut right on the line leave your self some room. It helps to leave it angler for when you cut it in half.