I used this tutorial from crafty couple. Just a couple notes - She states to cut the side panels 6" x 13", but the rest of the bag is only 11 1/2" high. So the panels should actually be cut 6" x 11 1/2" to match the rest of the bag. Also, instead of using interfacing to stiffen up the exterior fabric, I just saved myself a step by using heavy home decor fabric. It worked great. Here's some pictures of my finished diaper bag.
|A pocket on each side for stuff like bottles, sippy cups or keys.|
|Two pockets on the outside under the front flap, for stuff like my Kindle and wallet.|
|Very roomy on the inside, with pockets for stuff like lotion, ointment, cell phone, whatever.|
|I left the bag pretty plain, but it is easy to accessorize with decorative pins,|
which makes it easy to change the decorations whenever the mood strikes.