It depends on what the project is. I generally use long tail cast on. However, sometimes even casting on loosely, the edge doesn't stretch enough. I made a beautiful pair of mittens for a little girl, but she couldn't get them on. The long tail cast on at the wrist wouldn't stretch. Now, for mittens, gloves, and hats I use a German Twisted cast on. I learned it from Amy on the free videos here on KH.