b.) Glue some cut-outs - glue stuff on the visor like paper cut-outs, put some neat stickers on it, or accent it with some colorful washi tape. However, do not put anything too thick as these may affect the visor's shape.
You can draw details on the cut-outs you put. The paper kitty I glued onto a pink visor needed some eyes, a nose, and some whiskers.
c.) Add details beyond the template outline - draw details sprouting from the top edge of the template such as a pair of eyes or a pair of small ears to make an animal-shaped visor.
If there isn't enough space for the detail you want (e.g. long bunny ears), you can always just draw them on a separate sheet of paper and later glue them onto the visor before Step 8.
Scoring creates a crease that makes folding the paper a lot easier. Find a scoring tool such as a blunt plastic knife, spent ballpoint pen, or a pencil.
Score along the dotted lines by running the scoring tool across both lines. Make the crease as deep as you can (without puncturing the paper) by applying pressure as you run the tool along the lines.