If you can't be bothered basting it then at least pin it. Trust me!
An awful habit that I've developed is pinning parallel to the seam which often results in a lot rework when I get the direction of the pin wrong. A better way to pin is perpendicular to the seam (as shown in the pic. above) the pins are easy to remove as your machine chugs* along.
*Of course your machine might hum.
For more sewing tips head over to Carmel's.