Most readers will spread the dirt, sand, or ashes on a flat surface. They begin to look for a pattern that may represent symbols or pictures. They interpret these symbols and pictures to what is going to happen in your future. Some look for certain symbols that are seen over and over.
To find a good reader, look in the phone book or ask your friends. Most likely, if someone is recommended, they will be a better choice to choose from as your friends wouldn't steer you into a bad business decision. Once you have chosen a reader, go by and see their office. This can give you a great idea and insight into their practice.
Some of the patterns seen are lines, triangles, spirals, and hearts. With many lines, it may mean you are about to embark on a long trip. The triangle represents power that is equal on all sides. The spiral may mean you will be entering into higher planes. The heart, of course, means love.