When it comes to applying mascara, a common question is what color, rather than how to apply make up.
For most people, black is the best color to work with for most occasions. If you have red or very blonde eye lashes, then brown is a better color.
The first step, if you have long straight lashes, or downward facing lashes is to curl the eyelashes.
Apply the mascara from underneath the upper lashes (the eye side) and for the lower lashes, the upper side (eye side).
Layer mascara to achieve the depth required.
Separate the lashes as you apply the mascara
A useful e-book on how to apply make up, is available here