1. This is probably the most important. If you are starting out then it is of utmost importance that while doing your Eyeliner especially on the upper lash line, you rest your arms on a solid surface and then begin to draw the line. Start from the inner corner and then move to the outer. And if you find it hard to draw a straight line along your eyes, your best bet would be to draw three short lines and join them slowly. This would ensure the line’s parity and make it smoother.
2. If you are a beginner it is always a good idea to start with pencils. They are far easier to manoeuvre than gel liners and definitely the almighty liquid liners! Although you cannot really get the smoothness expected out of liquid liners, it still gives a polished look.
3. Gel liners are a great option too. Perhaps even better than liquids sometimes. However, it all comes down to the brush you use with it. Several brands have really thin liner brushes which make it very convenient to use. Inglot has a curved liner brush, and Real Techniques has a very thin brush with very thin yet dense bristles which gives you a smooth line. It also makes drawing on a winged liner that much easy. The only side effect to the gel liner is that it has a tendency to dry out a bit fast, but nothing a bit of Duraline can’t fix!
4. If you are keen to draw a wing, then make sure you outline the wing before actually drawing the rest of the liner. Ideally you should follow your lower lash line and extend it upwards. If you have difficulty doing so, placing a tape on the side of your eyes to mark out the exact line or holding your eyelash curler along the sides helps you to get a very defined wing!