Need help boosting blog success

I have three blogs that are not doing that well. I need help getting quality traffic to them. I do not want to get crap traffic that it not going to do me any good and get me in trouble with the search engines, I need help with how to get long lasting results. Let me know what you can do for me and how much you will charge for it. And any kind of proof you can give me of past success would be a big plus, references, search engine results whatever. thanks!