There are several ways to make FG. When I first moved down here there was actually a class on the different ways to make them. What was funny that none of us liked just one method.
[1] use the Angler. with this method you make each FG separately using one large rectangle and 2 smaller squares at the corners. At the Pam Bono site there is a video tute on making serial FG. There is also a similar method but not using the Angler.
[2] use the Eleanor Burns ruler method.
[3] use the No Math ruler method.
[4] use a paper pieced method - like sew & fold.
[5] use the method pamsamkin referred to above - make 4 at once.
The key is to find one method you like. Personally, I don't like the #2 or #3. I know I make good FG with #1 with or without the Angler, so that is what I stick with.
Try each and see which you like the best. Though borrow the rulers if you can before you decide to buy.
ali