As with most activities, the more you prep, the easier the task is to complete. When applying eyelash extensions, it's best to assemble all the tools you'll need before you start the process. Keep in mind that depending on how many lashes you're putting on, it could take a couple of hours.
First, you'll need the actual eyelashes. You can buy these at beauty and drug stores. They come in small packages, and depending on the brand you purchase, you'll find that they aren't exactly single eyelashes; they're a little bundle of a few lashes that are knotted or bonded together. They don't naturally stick on, so you'll also need eyelash glue. You'll have to purchase this separately, or it may come as part of a kit.
Other tools you'll need are aluminum foil and a toothpick for the glue, a small pair of scissors, a pair of tweezers to help you apply the lashes and a cotton swab to make sure they stay on.