This was a quick easy project with lasting results. All you need is one of those scented packets that you can get at Pier One, coffee filters and some ribbon.
Simple open the scent packet, divide the contents between about 10 coffee filters and fasten each one with some ribbon. I put a bunch of these in between my towels to make them smell nice. I also put some in various drawers. You could use these in cars, shoes, anywhere you want to smell nice.