I keep seeing quite a lot of stuff like the attached screenshot:
At the moment, I usually fumble around with the pencil tool to draw a rough curve and then spend ages smoothing it before tiling it to create the circular pattern. More often than not, what I create isn't as 'crisp' geometrically as it could be.
Here are two attempts. The one on the left was made by cutting up circles and creating the line joining the top spiral to the bottom 'tear drop' using the pen tool. The one on the right was just done with the pen tool. Both are a little bit rough around the edges and that is something I want to try and fix.
What could I do to improve my workflow and achieve a better result?