Cut your paper to the size of your notebook's cover, using the ruler to help you measure out the correct size.
If desired, cut any smaller shapes to decorate the front using scissors and the cardstock. Set aside.
Place wax or parchment paper underneath the cover. Apply Mod Podge to the front of the notebook with a paintbrush. Carefully line up the paper on your notebook, and smooth it into place, wiping away any Mod Podge that comes out the sides. Let dry 15 - 20 minutes.
Assemble any die cuts for the front of the notebook, using Mod Podge to stick them together. Let dry.
Use Mod Podge to glue the die cuts to the front of the notebook. Let dry.
Seal the front of the notebook with a coat of Mod Podge and let dry. Spray with acrylic spray if desired to reduce tackiness until fully cured.
Use washi tape to add to the binding of the notebook. If you find it's not sticking, seal it with Mod Podge.