i see. but my best blog's PR is only 1...but active blog is still PR0. Now I want to generate more traffic coz I aim for more earning from Adsense, so I need more traffic to get more chances on clicks, any good idea to increase traffic, i really run out of idea. thanks.

SEO and SMO is the best way. Better focus on SEO, it will generate good traffic for long term if you doing a great job on it.

my blog is mixed blog, no focus on certain topic, so hard to work on SEO, right? but another automobile blog of mine is more focus, maybe can try that. any link to recommend for me to read more on SEO for my blog? I heard adding meta tag is very important & can help to get high rank in google search results, any idea how to add meta tag? I hv no idea at all. thanks.

Forget aout meta tag, it is ignored by google

looks like i have to 4get about meta tag coz most of u tell the same thing. but i wonder why some blogs still mentioning. thanks.

Many people dont know about it or they put it previously and not going to remove it since it dont give either positive or nagetive impact on google SERP

I see. Does SEO mean to have more relevant keywords in the blogs? Eg, my blog is about cars, so I should have more keywords like cars, vehicles, auto, automobile etc in my blogs/posts? or...?

SEO include many thing, keyword only the partial of it. Not saying to include all the related keyword, but focus on certain keyword and make the keyword density abit more

so my assumption above (more keywords on the contents) is part of the SEO also?

But then again you have to sprinkle your keywords properly if you wanna get the best out of SEO.

looks very difficult to do SEO.

Here's an article I believe should benefit everyone who wants to add advertisements in their blog. This isn't my article.

Selling Ad Space: Tips from Top Design Blog Owners

thanks for your link, will spend sometime to read it...