The easiest way to do this is to cut lay the pallet so that the long planks are in parallel with your own position. If your pallet has nine planks, like mine did, then count over three planks and then saw the wood between the third and fourth planks. Saw right in the middle, to keep things easy and to ensure that all of your proportions remain correct. Continue another three planks and cut again. Remember that you'll have to saw in the exact places on both the front and back of the pallet.