Today's tip comes via Southern Biscuits by Nathalie Dupree and Cynthia Graubert with some minor whole grain modifications by me.
To make your own light, semi-whole-wheat self-rising flour:
Whisk together 1/2 cup white whole wheat flour, 1/2 cup all-purpose flour, 1/2 teaspoon salt, and 1 1/2 teaspoons baking powder.