Before attempting any cleaning always test the product that you intend to use in an inconspicuous place.  Two staple products that you should stock in your kitchen cupboard are ordinary soap flakes, which can be mixed with warm water.  Apply this mix by immersing a clean white cloth into the mix, wringing out and applying in a dabbing action (NEVER rub!).  When you have completed removing the mark, repeat the process with warm water only to remove the soap.  The other item you should keep in your cupboard is a clear spirit such as Vodka or polish spirit.  Use on a clean white cloth in a dabbing action – this is particularly helpful for oily stains and dry clean only fabrics.