OK... im going to go against the norm here... dont over think it and just smoke at whatever pace is comfortable... I smoke like a god damn beast, very fast! but I never get any tongue bite nor does my pipes get too hot either, I think it's because of my packing method... but I just cant smoke slow... nothing wrong with that and nothing wrong with going slow either... I think you should follow what Daytonsean said: find something to do while you smoke and you will find your natural cadence.
Now smoke a bowl dammit!