Hi,

I have just started an online business and I want to promote by business on popular sites on the net
but I don’t have any idea how it should be done.

Do you guys have any idea that can help me out?

Yeah! It’s very good thought to promote your business through popular sites.
You can give banner ads to the popular sites that allow for it.

What do you consider being a "popular" site ?

You must, first of all, get an idea about your target audience and which websites they are visiting. This may need some investigation from your side.

When done, you can either contact the webmasters of such sites directly or use advertising networks like Google AdWords or Overture.

If your budget is limited, then I recommend having a look at social communities, discussion boards and other places where you can meet your target audience. You may subscribe to these services and do some guerrilla marketing (of course within the accepted range of these boards).

Try to learn SEO or hire SEO for your site.

That also depends on what business you are doing.

Try to buy an Ad spot on the relevant sites, if they use google ads.
(ie, create an AdWords campaign)

And if they don't have google ads on their sites, then manually approach
them for a deal.

What kind of your products? I think SEO works for online business, have a try.

You need to have a budget before you can pursue this kind of idea..And with that it is very easy to promote your business in different popular sites.

Forums like this will help you a lot. Learn and search on everything about seo and you will know how to do it. It's just a matter of patience and everything will just follow. Read and implement.

If you want to promote your site, try to learn SEO. Promoting is not a big problem if you have money.