Firstly, clean out your sink after every use with a disinfectant cleaner and a micro fibre cloth.
For a once a week thorough clean, wet all surfaces, then sprinkle some bicarbonate of soda on your sink and draining board, including the taps. Using a micro fibre cloth rub the areas, forming a paste for a super clean and rinse thoroughly. For those nitty gritty areas use an old toothbrush.
Next soak some paper towels in white vinegar and place around the sink and draining board and leave for a few hours. Then thoroughly rinse with plain warm water.
For sinks with a garbage disposal pour a couple of cups of bicarbonate of soda down there followed by a cup of white vinegar and leave to fizz. Then boil a kettle of water and pour this down.
Dry off all areas with a clean dry micro fibre cloth.
For extra shine, rub a little baby oil into your sink and draining board.