When cleaning sinks and showers/tubs, make sure to check the faucets and handles as these are quick ways that neighbors check to see if their place has been cleaned. Shiny faucets lead to higher ratings. Using something like the Mr. Clean Magic Eraser with a little water helps remove build up and wiping with a dry cloth will get it nice and shiny. Taking the time to wipe the faucets dry helps to prevent water marks from being left behind, which can negatively impact your ratings.
You can find a full overview of what the Neighbor (customer) expects from a standard cleaning here: http://bit.ly/lapa-lopa-cleaning-whats-included