The requirement to get the russian visa (tourism visa) may vary slightly depending on your nationality and where you are applying to. For instance, an agreement between Russian Federation and European Union signed in 2007 made easier the application process for russian visa.
To apply for a Russian visa, you must have a valid passport for at least six months after the date of your departure from Russia and the passport must have a blank page (or two or three depending on your nationality).
A postal application can be made for all types of visa for Russia. This saves you the hassle to go to the Russian consulate (or embassy) in person.
Make photocopies of all documents you submit to the Russian visa.
Documents you need to apply for a Russian visa