I'm new here, and thought I'd post my latest project. I hand-sewed it because my sewing machine is in transit.(we're moving) Anywho, here's the jacket:

Finished:

The Cell Phone Pocket:

The Inside:(I used some spare cord fabric and some fabric from a few old pairs of pants in my possesion.)

Sorry that last image sucks. I plan on using it for school... but I don't like the blackness of the handles. Any ideas?
Tutorial time. I'm sorry that this tutorial sucks. You probably can't understand it.
-Get a jacket out and lay it flat. Cut a straight line just below the arms of the jacket(make sure that the zipper, if you have one, is under this line so that you can keep it.), keep to the side for later.
Cut off the arms, and cut along the inside seams of the arms so that you have two squares instead of tubes. Cut one arm peice directly in half(you want to have two 5"x11" peices[sides], and one 13" x 5" peice[bottom]) I was able to get all three peices from the arms of the coat alone, you might have to salvage from somewhere.
Take the torso of the jacket and cut along the side seams so that you have two peices; the front and the back. My measurements for the torso peices were 13" x 11"

-sew the side peices to the torso peices so that you have the beginings of a bag with no bottom. My measurements after sewing these peices together was a rectangular prism that was 4" x 10" x 12"
turn inside out and sew the bottom peice so that you now have the makings of a bag. you should now have a bag that is 10 inches tall, 4 inches long, and 12 inches wide. If you have the zipper on your bag, it should work. this will come in handy BIG TIME.
-For the inside of my bag, I made 10 3.5" x 11" strips of fabric. Then I made two 5" x 11" strips of fabric. Then I sewed them together so that I had a 28" x 11" peice. Then I joined the two ends and sewed a 13" x 5" peice to the bottom so that I had an inside lining of my bag. ignore the measurements on the image.

-Now for the hard part(in my opinion). Take both peices and what you are going to be using as the straps of the bag.

turn your bag peices inside out and place the lining inside of the outside of your bag. pin your straps so that they are inbetween both the lining and the outside of the bag and so that the handles do not stick out, but are inside. sew, make sure you re-enforce the seams where the straps are(I made a box with an x in the middle)
Turn right-side out and enjoy!