I have learned:
....not to sew when I am tired or in a hurry...I end up making too many mistakes.
....a project is more enjoyable to work on when I take my time to choose the right fabrics for the pattern.
....when sewing with a large group in a class or workshop, label your sewing notions with your name.
....joining a quilt guild has been a fun experience where I have gained both friends and knowledge.
....no one wants a quilt in colors they dislike...ask them first what colors make them happy and go with it.