How to create web 2.0 pages properly?

Hi everyone,

Trying to put all the pieces of information together I have stumbled upon a big doubt about how to create web 2.0 pages...

My doubt is the following:

Do you target all your web 2.0 pages to your main keyword? If not, what percentage do you use for your main keyword and for your LSI related terms or niche related terms?

Note: To me, the meaning of "targeting target all your web 2.0 pages to your main keyword" is to include in the title the main keyword and include this keyword in the body text (with a 1% or 2% density) But it does not necessarily mean to include an anchor text with this keyword...

I am a little confused because according to some marketers, they target at least 50% of their web 2.0 pages to their main keyword and for other 50% they target their web 2.0 pages to LSI and niche related terms.

However, on the other side of the coin, the same marketers recommend not to surpass 30% of main keyword in the anchor text... I am sure that I am missing something. To me, this is a contradiction unless he meant that he target 50% of their web 2.0 pages to their main keyword but they use the main keyword as an anchor text only 30% of the time... Is the reasoning right?
What is the way you do the creation of web 2.0 pages?

Thanks in advance!
Steve