Think of your quilt layout as a grid as shown above. It will first be sewn together in the vertical numbered strips. It will be very helpful later on if you take a picture of this layout and write the letters and numbers on it. The picture doesn't have to be pretty, it just needs to show the whole piece. (I took this picture standing on top of my stove with the layout on the kitchen floor!)

To prepare to sew:

• Using a permanent marker, number fifteen small ziplock bags with the numbers 1- 15
  
• Starting with Strip 1, arrange your squares into a stack like so: Pick up Piece A and place it on Piece B, place those two on Piece C... until you've picked up the whole strip Pieces A- O.
• Keeping your pieces in order, with Piece A on the top, slip your stack into your ziplock bag numbered 1. Zip it closed and put it aside.
• Repeat these steps for all fifteen rows.

Follow along with the pictures of me prepping Strip 2: 

Here I am stacking the squares from Strip 2 together. Square A is on top, Square B is directly underneith A, and Square C is being picked up.

Here is Row 2 all stacked up, Squares A (on the top)- O (on the bottom)

The stack goes into it's numbered ziplock.

Here are Strips 1-8 bagged and ready to sew!