DIY Binder Dividers: Free Printable Templates Step 1: To reinforce the edge of your DIY binder dividers, apply a long strip of packing tape over the left edge of each piece of cardstock, folding it over so that it covers the entire edge. Then, punch the divider with a 3-hole punch for use in a binder. Step 2: Use one of our editable divider templates to type your label names onto each ...