The most important concept in our lettering program is "P-I-E". "Pencil-Ink-Erase".
Start lettering with a PENCIL. Take your time and 'draw' your letters rather than 'writing' them. Practice each letter multiple times until you are comfortable with the form.
Next, INK over the pencil marks of your best efforts. A good black fineliner is perfect for this. (Prismacolor .03mm pen is my favorite).
And lastly, ERASE the pencil marks, but only after the ink is dry. You will be happy with how clean your handlettering looks after you brush away the eraser crumbs.