|from google picture http://cdn.shopify.com/s/files/1/0131/6922/files/patch-camera-web.jpg?307|
It is such a sad thing when your favourite pair of jeans has a hole at the knee (or wherever...), isn't it.
I've come across this blogpost and I just love what she's done to the jeans.
You can also search the internet for sashiko and find a lot more inspiration!
Another option would be to cut them apart and take the pattern in order to make your own jeans from them. And use the rest as cleaning cloth...