Take a look at your black or dark gray liner: Is it dull? If so, you'll want to sharpen it so you can fully control the line.
Start by lining your upper lid, as close to the lash line as possible, from inner eye to outer. Don't go past the outer corner of your eye.
Next, move to the lower lash line, and draw from about mid-line to outer corner. Again, stay super-close to the lashes. One way to do this is to dot the liner in between the lashes and then connect the line by smudging it, either with your sponge, your cotton swab or your finger.
If you have small eyes, don't line the inner half of the lower lid. If your eyes are large, you can complete the lower line, but it's not necessary.
Lightly smudge both upper and lower lines to soften them. Then take out your shadows.