If you haven't worked a lot with bias edges before, starch your fabric really, really well. It will be stiff, but the triangle edges will be very stable :wink:
Spray it heavily and then let it hang to dry, if you press it while it is still damp, you may slightly distort the fabric and make lining up the repeats more difficult :D
Once it is dry, you can press and shouldn't have any distortion :D
Flat, flower head pins are almost a necessity, traditional pins won't work nearly as well, as you will be placing your ruler on top of the pins and the ruler will rock.
Cutting the whole length of fabric in half first, makes cutting/handling the repeats much easier too. You only have to deal with 20-22" instead of 40-44" :D:D:D