Because the surface of each lash extension is so small, it's easier to dip them in glue than put drops of glue directly onto the lashes themselves. Start by pouring a small amount onto a smooth surface. This could be a piece of aluminum foil, or it could be a small plastic surface that comes with your eyelash kit. Stir it with a toothpick for a few seconds to help the glue become tackier so it sticks better. Then pick up a lash with tweezers and rub the end in the glue. Try to get a thin, even layer on the lash so it doesn't look lumpy.
Now it's time to get in front of a mirror, because you're ready to put them on.