Darlings, on a very spontaneous note, and not at all because I walked in on Vax doing this very thing, please, for the love of the gods,
do not use a knife as a tracing line for eyeliner. I understand that the result
may be effective, but at what cost?
Given that Prom that will be raising funds for my beloved's youth center is around the corner (which, darlings, you should all be attending!!) try these tips instead.
For a winged look, create the flick at the outer corner first and then connect to the line along the lash line--and to create a balanced, even look, start small with the wing and use a card or tape to measure the angle. You can always build out the wings, but it's difficult to reign it back in. You'll also want to keep your head titled back, and steady your arm or elbow on a flat surface. In a pinch you can use your little finger on your cheek. Don't worry about getting one flawless line in one application! Draw a few dashes or dots along the lash line, and then connect those. Those smaller strokes will give you much more control and comfort with your eye shape.
If you've made a mistake, which certainly happens, take a breath and let the eyeliner dry before attempting to clean it. I, personally, line my lower lid as well but that's because I have been accused of being dramatic and doing the most, and I don't shun these labels.
Above all, if eyeliner doesn't jingle your jangles, don't bother! If you want to experiment with colored liner, do! If you like how something looks on you, that's what you should be sporting, regardless of what anyone says is the 'right' color for you or the 'right' shape. What looks best on you is what you feel the best in, and that's true of makeup and clothing. That confidence and joy will outshine any accessory--I say, as someone who wears enough jewelry to accidentally blind low flying birds.