I like to use the method of printing a sheet of triangles and sewing them all at once. I have tried lots of methods and did contemplate getting the triangle magic program. I tried the quick method with two squares, but then all your seams are bias, and you are still not assured of the exact size you need. Then I discovered you can print out your triangles via online programs. Same thing as Triangulations, just a limit to the number of sizes, but for me every size I have needed was here.
http://www.quiltingandwhatnot.ca/Hal...-Triangle.html
http://www.quilt.com/Blocks/Triangle...Triangles.html