I saw this messenger bag on pinterest but when I clicked the link it was broken. Bummer, right? So I thought "that looks easy enough" and I'm a fairly smart cookie so I set out to figure it out.
This was my offering:
This was the original pinterest inspiration (Pinspiration, if you will)
It looked easy enough, so I made 12 granny squares using this AMAZING tutorial http://rensfibreart.wordpress.com/2patterns-2/the-humble-granny-square/
and changing the color every row and working four rows.
Then I attached them together in 2 sections, the inside portion in a 2X2 section and the back flap/front flap section in a 2X4 pattern.
Then I double crocheted around the conjoined pieces, then I single crocheted around it changing colors for the single crochet.
When I started crocheting the gusset and shoulder strap in one long piece I attached it as I went to the back loop only of the inside piece working down one edge, along the bottom then up the other edge. When I got the the corner I kept on crocheting chains until the should strap was to my desired length. I then reattached the chain to the staring stitch and switched colors. I crocheted 3 more rows working single crochets all around the inner panel.
When I got the last row I started attaching my stitches to the back flap/front flap panel in the same fashion crocheting through the should strap and the back loop of that panel.
Then I attached a button and bid it a fond goodnight.
I think for "winging it" I did pretty well.