Nikki,
It takes practice. One of the things that helped me is "fork" pins. They look like a bobby pin with sharp points on both ends. I found mine at JoAnns. I make sure that the seams line up then put the pins on both sides of the seam. I saw them on one of the shows, pretty sure it was one of the 300 shows.
Frances
Does anyone have any tips on how to get my seams to meet on 9 patches? They always seem to be a hair off. I tried pins with a little luck but not much. Are there any secret tips? Or is it just practice?