Four tips I learned from belonging to Neiru. (A online website that teaches Japanese nail art)
When doing fine line work
- Anchor your hand.
from http://www.thegoddessguide.com/
- Overlap your lines when creating thin fine lines.

from https://neiru.me
3. Do “The Pulley”
Not only should your brush hand move, you should be moving the fingernail that you are painting in the opposite direction. (2 hands make easier work)

from https://neiru.me/
4. Equal Pressure. Always apply the same amount of pressure when painting fine lines. This way you will end up with the same amount of product in the line.

from http://www.nailitmag.com/
A really great site for learning new techniques, especially if you don’t get any classes where you live!
Go on over to https://neiru.me/ and sign up!