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Self Rising Flour
http://southernfood.about.com/cs/breads/ht/self_rise_flour.htm
If your recipe calls for self-rising flour and you only have all-purpose flour, here's how you can adapt.
Difficulty: Easy
Time Required: 1 minute

What You Need:
all-purpose flour
salt
baking powder

Here's How:
Using a dry measure, measure the desired amount of flour into a separate container.
For each cup of all-purpose flour, add 1 1/2 teaspoons of baking powder and 1/4 teaspoon of salt.
Mix to combine. (probably best to sift together)

Tips:
You can use self-rising flour in yeast bread recipes, but you'll need to omit the salt.
If you use self-rising flour as a substitute for all-purpose flour in a quick bread, omit salt and baking powder.

Substitutes - Cake Flour vs. All-purpose Flour
http://southernfood.about.com/od/ingredientsubstitutions/fl/How-to-Make-Cake-Flour.htm

If you don't have cake flour, use 1 cup minus 2 tablespoons of all purpose flour sifted with 2 tablespoons of cornstarch for each cup of cake flour called for in a recipe.
If you only have cake flour and the recipe calls for all-purpose, use 1 cup plus 2 tablespoons of cake flour for each cup of all-purpose flour.