For a lot of people, having a clean kitchen starts with having a clean sink (for us it starts with clean chairs).  For Flylady a clean sink is the focal point of gaining control over clutter and chaos in your life.  She has a step by step process for getting your sink to sparkle that includes butter knives, Windex, and possibly even car wax.  Source: FLYing Lesson: Shining Your Sink | FlyLady.net

Good Housekeeping has their own set of tips for cleaning bathroom and kitchen sinks that are less intense but don’t give the super clean feel of FlyLady.