Paper Piecing Tutorial
NOTE: Please refer to my Paper Piecing Tutorial "SET" for a proper order of photo instructions.
Sometimes with angled seams (and in the center of pinwheels) you'll end up with too much seam bulk. By not stitching all the way through your seam allowances (as previously mentioned) you can press part of the seam open and the rest can be pressed to one side. When seams overlap, you can press the bulky sections up and down as shown below.