Which is the best way for a link in an article?

[sett]

Hi everybody,

I want to know that "which is the best way to put link for my site through an article either through “on exact primary keyword” or “on keyword phrase including my primary keyword”. Suppose I want to promote a product "abc" and “abc” is a primary keyword for my site than I have number of options mainly:

1-link on “abc” keyword
2-link on “buy abc” key word
3-link on “buy abc online” keyword

Please tell me which option will be fruit full for me.

[freewebsiteideas]

Leave buy and online out as they are commons words.

[justdave]

I'd use "abc" as the anchor text too. If you are linking within an article, the content surrounding the link is equally as important and will add value.

[Jon_King]

All three. Mix it up is the key.