There is nothing complicated about how to get a visa for Russia.
There are only 4 important things to do:
1) Check whether your documents correspond to the visa requirements
3) Complete your visa application form online
4) Submit your visa application form along with your visa invitation and other documents according to visa requirements to the Russian consulate or to the Authorized Visa Center ( if applicable ).
But above all, make sure that you have enough time for the visa formalities.
Take into consideration, that the visa issuing time at russian consulates is 5-10 days for normal processing, and 1-3 days for express processing.
Pay attention that express processing is available for business visas only at an extra charge.
Tourist visas are issued in the normal way.