By playing with light and dark eye shadow colours you can give the eye an ideal shape. The general rule is: light brings things into prominence, dark makes them recede.
In principle, you apply a light-coloured eye shadow to the upper eyelid, a dark colour in the eye fold and a light colour to the eyebrow arch.

Apply the light colour first using the brush and touch up with a latex sponge.

The dark colours (for instance, in the fold of the upper eyelid) you apply after this.

Hint: if the eyes are deep-set, you first add a light colour eye shadow. Then apply a dark colour to the eyebrow arch - not up to the eyebrow - to make it appear to recede.

You can make an eyeliner with Grimas Eyeshadow/Rouge and a little Cleansing Lotion.