The strainer in my bathroom sink was not performing well. As soon as a single one of someone's long hairs got caught in the bottom, it would collect someone else's flem and drain unacceptably slowly. The problem was the holes in the sides were effectively useless because they were so close to the side of the drain pipe. The simple solution was to create more of a conical shape so water could flow out the side holes when to bottom holes started getting clogged.
This MS Paint illustration should clear up any confusion:
I expertly modified my strainer to match the above illustration and it is working much better. It also looks...more interesting.