First, measure your iPod and your book. As you can see, my iPod is about 1cm thick, and my book is about 3cm thick. Figure out the distances needed to center your iPod in the book and mark the pages with the pencil.
Step 3: Trace
Next, place your iPod inside the book and trace it, leaving a small margin.
Step 4: Cardboard
Now, put the piece of cardboard in where you want to stop cutting.
Step 5: Cut
Start cutting with the X-Acto knife, following the drawn lines.
Step 6: Test it out
After you have reached the cardboard, test out your hole by placing your iPod inside.
Step 7: Trace Headphones
Now, plug in your headphones and trace them.
Step 8: Cut Wire Hole
Next, cut the hole for the wire. This only needs to be a couple pages thick.
Step 9: Cut Headphone Plug Hole
Now, continue cutting just the hole for the headphone plug. This does not need to go all the way down.
Step 10: Check the fit
Finally, place your iPod and headphones in the holes.