Like a donkey it has to be broken-in and for the task you will need
a lump mallet,
a claw hammer,
and a prybar.
You will also need a scrap piece of wood, MDF or ply to use as a cushion to avoided damaging the wood when knocking pieces apart.
Bare in mind that pallets come in various sizes, shapes and conditions, so you may find this manual to be more of a rough guideline then accurate instructions when applying them to your pallet.
Step 1: Steps
2) The technique here is to distribute your blows with the lump mallet between the three blocks (a, b and c) and gradually knock the sections apart.
3) Once you have done this to all three supporting sections place these pieces underneath the main body of the pallet.
Step 2: Steps
Knocking nails out of wood is a skill. A skill albeit that you most likely will never write on your CV but one that nonetheless require you to be patient and accurate.
If nails bend use the lump mallet like an anvil and knock them against back it into shape with the claw hammer.
If a nail becomes to malleable cut it in half using pliers or a hacksaw and try knocking it out again.