1.Apply an eyeshadow primer.This is another optional product, but applying an eyeshadow primer will help your eyeshadow to stay on for much longer. If you’ve gone without it, you may have noticed that your eyeshadow fades or becomes oily and collects in the creases of your eyelids after several hours. Use your fingertip to dab on your eyeshadow primer, blending it from the roots of your lashes to the top of your crease. Set with a powder to make a perfect base for blending your eyeshadow.
2.Put on your eyeshadow. There are many ways to apply eyeshadow, although the most basic and classic look is to apply a single color over the entirety of your eyelid. Use an eyeshadow brush (or finger for higher pigmentation) to apply your eyeshadow to your eyelid, starting in the center near your lash line and blending outwards. Fade your eyeshadow into your natural skin tone near your crease and the inside and outside corners of your eyes, to prevent any harsh lines from forming. If you want a bit more dramatic look, apply a second darker matte color of eyeshadow in a ‘C’ shape from the outside corner of your lash line up to the top, outer ⅓ of your eyelid crease. Finish by sweeping a lighter shimmer color starting from the inner corner and ending in the middle, blending with the rest.
Your main color of eyeshadow should never go all the way to your eyebrow, and should not extend further off your lid then the end of your eyebrow (unless you’re going for a very dramatic look).
You may, however, highlight your browbone (the area under your eyebrow but above your crease) by applying a lighter shade of eyeshadow. Be sure to use natural colors such as cream, sand, or white, if your skin is pale. Alternatively, try a nude shade slightly lighter than your skin tone. The color doesn't have to be matte, but any sparkle it does have should be subtle.
You can blend your eyeshadow onto your lower lid, sweeping the shadow along the lower lash line starting from the outside corner. Blend well so you don't have a harsh line.
If you use multiple colors of eyeshadow, always be sure to blend them together.
3.Apply your eyeliner. The purpose of eyeliner is to provide the illusion of a fuller lash line; therefore, choose a color that is similar to your natural hair color (or brown if you have blond hair) to go along your lashes. For a smudgy look, use an eyeliner pencil, or create a sleek and smooth look by using cream or liquid eyeliner. Create a dashed or dotted line across your lash line, and then connect the dots to create a full, continuous line. You can choose to wing the end up and outwards a bit if you want, otherwise you simply need to follow your lash line from the inside corner to the outside corner.
Adding eyeliner to your bottom lash line should be done sparingly, as it will create a much darker/bolder look and appear a bit more unnatural than eyeliner on your top lash line only.
If you feel comfortable, try tight-lining your eyes by using your eyeliner on the waterline of your eyelid.
4.Finish off with mascara. To complete your eye makeup, you’ll need to top off your eyes with a bit of mascara. There are several mascaras to choose from depending on the look you want; if you have short lashes, use a mascara that will add length, or if you have thin lashes, use a volumizing mascara. Dip the brush in the mascara once and lightly wipe off the excess onto the edge of the container or a paper towel. Looking straight forward, apply it to the top lash with upward strokes. Start with the inner part of your eye and work your way outward. Do both eyes with two coats, then let dry. You can also apply mascara to your bottom lashes if you like. 
Wiggle the brush as you apply it, as this will help to coat between lashes instead of just the under layer.
Never pump your mascara brush in and out of the mascara, as this causes air pockets.
Avoid applying more than two coats of mascara, as this will take away the natural darkening look and give a cakey thick look that is much less natural.
A good trick for making your lashes look fuller is to apply a coat of baby powder between coats of mascara; this will add a bit of length and volume to your lashes.