Using a duo fibre brush apply a highlighting cream ( recommend MAC strobe cream) to the higher parts of the face, i.e.; cheekbones, forehead, nose, upper lip and chin.
Blend outer edges with a smaller duo fibre brush
Matching up the persons foundation should be done before application, mixing different colours together can find the right shade and applying to the lower part of the cheek to match the skin tone.
Apply the foundation to cheeks, fore head chin and nose and then blend in with a big foundation blending brush.
Using a smaller foundation blending brush blend in the smaller area ie; under the eyes, around the nose, chin and eyebrows.
Keep blending until the foundation application is even