There can be many ways to creatively include buttons in your scrapbooks and cards. Buttons can be used as holiday ornaments on Christmas cards, eyes on cartoon animals,or simple flowers.
I have discovered the best way to attach buttons to paper is with hot glue, although I would recommend only using hot glue if you are gluing the button to heavy card-stock. Otherwise I have used small pieces of double sided foam tape (thin double-sided tape usually falls off).