I went to Michael's to buy my supplies when they had fall floral at 40% off. When I am buying materials to make a wreath or floral arrangement, I actually put it together temporarily in the store so I know what pieces to buy.
I began by wrapping burlap around almost all of the wreath, leaving room for the floral picks and the bow.
For this wreath, I selected one other big piece with another pumpkin on it to add a third "anchor" element. I slid it into the top and created a little triangle with the flowers and big pumpkin.
Finally, I added two smaller pieces (one on the top and one on the bottom).
I have not mastered bow-making yet, so I bought a premade bow that I tied onto the left corner. I also spread out the ends and wrapped them around the sides of the wreath.
Here is a current picture of my front porch now that the mums have blossomed some.
You can see the right yellow mum is a little lopsided; that is because someone threw a rolled-up newspaper on top of it. I wasn't thrilled, but I guess it's not really a big deal.