When getting a link to one of your websites you need to make the most of the link - not all links are equal. Here are my 4 tips for getting the most benefit from a link in terms of SEO:
Place the link on a page with higher PageRank
This means the link will have more PageRank to pass to you and will hopefully help push you up the ranking in search results.
Try to place the link on a page with only a small number of other links
When passing PageRank to other pages, the rank of a page is divided up between all the outgoing links on the page. If there are a lot of links on a page, the benefit passed by each one is reduced.
Place the link on a page on a similar topic to your own
For example a link from a page talking about shoes to one with a topic of finance is probably worth less.
Make sure the link text reinforces your keywords
For example, if one of your keywords is "Greek Holidays", make this the text associated with the link using the href element.