This lovely back-pack pattern is the best bag I've ever seen - step-by-step photographed instructions that come with it make it absolutely foolproof! This tutorial helps too.
The zipper is very easily inserted, and means the bag can double as both a shoulder bag or (with the zipper unzipped) a backpack.
The pocket on the outside is perfect for customising, and I chose to applique two 3 dimensional roses framed by leaves.
While you can't see them, I've created extra pockets where prying hands cannot reach, so this is a perfect travelling bag to adapt to your own requirements. I really love this pattern!