Building Keyword Lists

I need someone to do several different simple jobs for me on an ongoing basis. The main task will be to build keyword lists for PPC campaigns. I will require lists for about 3-10 different niches each week, some will be small and some will be quite big niches. I will teach you exactly how to do it. Other jobs include posting articles to ezine directories like EzineArticles, and also posting articles to my blogs. I can show you these things as well. Please put in a bid for 10 hours work. Keep in mind that this will be ongoing work, and we will work out how many hours I require on a weekly basis, so I'll pay an hourly rate. Please include any previous work and examples of work that will help me decide.