You could argue that the eyes are the most important part of the face (windows to the soul and all that). For a makeup artist, never has a sentiment rang more true. The eyes are a canvas for many creative colors and techniques, but the last thing you want to do is taint your carefully applied shadows and liners with spidery or clumpy lashes.
Floriane David of Make Up For Ever Academy admits that one of the worst mascara faux pas is the floating lash look (this issue is especially rampant among blondes). She recommends using a fan brush to get right to the root of your problem. First, apply mascara onto the fan brush and then paint onto the lashes. You can also use a shaking motion (with your mascara wand or fan brush) to make sure you are getting the base of your lashes coated. And that's how you shake things up.