Conventional wisdom says you're supposed to add stitches to your buttons so that they give the illusion of being sewn on, but, alas, I am lazy.
Decorative paper clips are a common scrapbook embellishment, but you can glue your own buttons or other trinkets to regular old paperclips and save your pennies.
Patterned Paper, Chipboard Border: Me and My Big Ideas\
Border Punch: Fiskars
Adhesive Tag: Reminisce
Label Sticker: Hampton Arts
Striped Twine: My Mind's Eye