What are the New Techniques for SEO?

I want to Permit my Site but i am using old Techniques. So please give me some New techniques for SEO.

How do I make the most out of AdSense and blogging?

I’ve read here that get paid to write web sites like HubPages and Associated Content are a good way to build a portfolio but earning money through AdSense that way is slow. If I just use my own blog(s), or else combine my blog(s) with the write for pay sites, what’s the best strategy?

Should I make several blogs on the same topic to increase hits to the same AdSense ads?

Should I stick to just blogs, or do Iuse HubPages (or another) as well?

Is there any blogsite there that allows AdSense besides Blogger?

How many articles per day and how many hits per day do I need to get to receive a paycheck every month or every two months?

What if I find a niche topic that I like? Can I realistically expect to make money from it just because I’m knowledgeable in it and can write about it? Or is the market simply dominated by specific subjects?