Take the butter or solid shortening out of the refrigerator as early as possible. Put the flour into the bowl.
Add the butter or solid shortening to the flour.
Use a pastry blender (knives or a fork) to push through the butter and cut it into smaller pieces. Result will be better with pastry blender.
Keep pushing and rocking the pastry blender (knives or a fork) against the bottom of the bowl through the flour.
Keep working until the butter clumps are at least as small as small peas. Now it's ready to use.