Substitute quick-mixing flour for the all-purpose flour.
Substitute baking mix for the all-purpose flour.
White wine, dry sherry or Madeira wine adds a wonderful flavor to gravy. Replace half of liquid with your choice of wine.
The trick to smooth, creamy gravy is to use a wire whisk when adding the flour to the drippings, beating rapidly until smooth.
For added flavor, use vegetable cooking water, tomato juice or vegetable juice as part of the liquid.