i often heard that medical field sites will make good money, but there are so many medical products, how to choose the right one? tks
The sites that are in the medical niche and make great revenue know about that medical field, you can't expect to know "nothing" about a certian medical niche and produce a large content rich site about it. Most people end of using others content and rewriting it or rewording it. I would suggest finding a niche you know and can write your own content about.
medical niche is good, because it may content some high keyword. you have to have a quality content for that
Choose a niche which you know something about. You won't be able to write content for medical or real estate site if you know nothing about it. The $$$ you get from clicks depend on where is your traffic coming from too. USA traffic converts best.
Its always possible to hire cheap article writer. simple plan for every niche: 1.) you find good long tail medical phrase which is searched big times daily, and you check how big is competition. 2.) if competition is low, create for example wordpress blog with keyword rich domain and make on-page seo. 3.) write 5-20 articles about this niche or hire someone to do that for you. 4.) add articles to article directories and your blog and grab backlinks from other sources. and you're done RiTu
Law seems to pay higher CPC than medicine, but here's some keywords to look over - http://www.keywordsdatabase.com/medic/