When you are developing a tag or writing style, start simple and build from there. First, think of what word or name you'd like to represent yourself with. The name should have some kind of connection to you (ex. I chose "Cicada" to represent a special childhood memory of mine, "TAKI183" combined his nickname and his street number.) Then start working out the composition, direction, size, and style of your letters in your tag. Choose a writing style that looks good to you, and feels good in your hand (with practice, you should be able to draw it quickly in one continuous smooth motion). Practice single line tags first, then once you've found the best version, try giving it more impact by making your letters bold and adding extra elements and having the letters interact (connect/overlap) with each other.