Hi all: One tip that I found out the hard way - make sure that your printed paper is "printed side out" before sewing. I had printed the pattern on very see-thru paper (foundation paper piecing paper), and that caused me to not realize that the paper was wrong side out! I could still see the notations because it was see thru. I ended up making 4-5 of the portions backwards and had to redo them! Quite frustrating.
Another tip, leave the paper on until the last moment. By the last moment, I mean... never cross a seam that has paper in it (it's too difficult to pick out). But if I have two long seams to sew together, it is much simpler with the paper still intact. It becomes much, much more accurate (I'm a beginner with this!!). Again, I right away, remove that paper within that seamline I just sewed, as you don't want to cross that seamline with another row of stitching. HTH