Whenever complete organic search engine optimisation I also suggest that you have paid search as well. Why should you pay if I have already done such a good job that you are alredy on the 1st page of results? Google denies that pay per click advertising does any thing to help organic search but it does.
It can help keep you on the 1st page and move you up the results too. Don’t be tempted to do this too early make sure that you have good content to drive visitors too.