Write the following sentence in your sketchpad, using your pencil: "A quick brown fox jumped over the lazy dog." Write the sentence as quickly as possible, using all capital letters.
Notice your line formation. Look for indicators of your future tagging style, such as extremely square letters, or a definite leftward slant. Match your writing style to the following graffiti styles: round letters to bubble graffiti, slanted letters to slanted graffiti, square letters to angular graffiti.
Rewrite your sentence, exaggerating the quality of your letters. For example, if you found that you tend to use square letters, and want to turn this into angular graffiti, start slanting those areas that were un-slanted in your first sentence.
Continue rewriting the sentence, adjusting minor lines each time until you find a letter style you enjoy.
Write your tag "handle" (name) in your new alphabet. Many graffiti artists spend a great deal of time developing an alphabet that is both expressive and individual.
Search the Internet or view local tags in order to find an alphabet you enjoy. Tagging alphabets vary from person to person and region to region. Often times, the alphabet consists of abruptly slanted letters or colorful bubble letters.
Practice writing the alphabet in your sketch pad with a pencil. Use your inspiration to start your alphabet, but change those things you don't like. For example, you may enjoy slanted styles of graffiti, but would rather use the "O" of bubble letters.
Practice writing your name in your new alphabet style. Continue doing this until you develop the look you want.