If you have never done it before, it may come as quite the challenging task! No need to freak out.. it does take practice, but hopefully this might help you out! =)
Before I even put them on, I put on my eyeliner and powder, eye shadow, etc. I don't know what kind of eyeliner you wear, but it's possible that it will not work well with the lashes. I used to use a pencil that was greasy and the lashes didn't stick very well. I find that if I use a pencil liner on top, the eyelashes don't stay on as well.
1. The first thing I do is remove the lash from the package and pull off any glue that is left on it from the package. To remove glue, always hold the lashes as close to the strip part as possible so you don't accidentally pull the lashes out, and then gently pull the glue away.
2. They are always too wide for my eyes (from inside corner of eyelid by nose to outside corner of eyelid by temple) so I have to cut 3/8 to 1/2 inch off. Sometimes I cut a little off each end, sometimes the whole amount from one end. When you cut, make sure that there is not even a tiny piece of plastic strip left without a lash on it. In other words, hold the scissors perpendicular to the edge of the strip and be sure to cut right alongside a lash. If there is any sticking out at the end, it will jab into your eyelid and be uncomfortable the whole day. Believe me when I say it!!!
3. Next I bend them (curve) them so that they are more of an arc than a straight line, and then I put one along the rim of my eye to check the width and curve. Sometimes I switch lashes, using the one on the right eye that is supposed to be for the left eye. Sometimes that makes them fit better; it just depends on the lashes.
4. When you have a lash that you think fits the eye pretty good, apply glue along the strip. Don't put too much glue on, i.e., you don't want gobs of glue, and if you get too much glue on it, you can smooth the glue along just the edge with your fingernail to spread it evenly. When I get ready to put the lash in place, I hold the lash a little bit vertical (with the tips of the lashes pointing up rather than straight out) while I place the flat strip part against my eyelid as close to the edge of my lid as possible. I usually try to get the end closest to my nose in the proper place first, and then I lay the rest of the strip into place. Practice makes perfect, so the more you do it, the better you get. If you get it in the wrong place, take it off, wipe the glue off the strip and off your lid and start again.
5. While the glue is drying, keep pressing the lash in place so that it gets a good bond - especially press periodically at the ends until they are dry. To press them in place, you don't need to push on the strip part, but just push on the tips. That will push the strip against your skin for a good fit. Just keeping doing that until it dries. Press on the tips at one end, then the middle, then the other, etc. It only takes about 2 minutes for it to dry completely.
6. New lashes (wearing for the first time) should be curled with an eyelash curler after you put them on. Make sure the eyelash curler is clean (you can clean it with baby oil on a tissue or cloth) so that it doesn't stick to the lashes. When you curl them, get as close to the base of the lash as possible. If you don't have any lashes at all, curling the false ones may dislodge them so you may have to reapply them but go ahead and finish curling them even if you can tell that you'll have to apply them again because the next time you put them on, you probably won't have to curl them, or if you do, you can just curl lightly to refresh the curl.
The lashes fit better the second time you put them on because you've already worn them once and they have curved to your eye shape. The first time you put them on, you may want take them off after a couple of hours and reapply to get that "second time" look--especially if you are planning to go out somewhere.
There are all different kinds of lashes out there.. have fun with them and remember that practice makes perfect!