What type of links do you consider the best in terms of ROI, i.e. price & quality? Link from directories Links from links pages Links from blog comments Links from blog reviews Links from forums Links from social sites Paid links from link broker networks In-content contextual links
Links from forums - These can be useful, as long as the link is relevant to the subject matter of the forum post, and the link anchor text or surrounding text properly describe what content the link is linking to. Links from blog comments - Similar to forum links, however fewer people are likely to read a blog comment. Most just read whatever the blog is about, and ignore the comments, however some blogs attract fairly detailed and informative comments which will have a high chance of being read. In-content contextual links - If you mean the double underlined paid links that popup a window when you mouseover, then no. Just no. - If you mean the sort of manually added links you get in blog articles where the author is linking to related content, then yes, these can result in a lot of useful, targetted clicks.
Of course, in-content contextual links work the best for Google. I have recently seen that Google is discounting many types of links which could be built quickly - with methods such as directory submission, social bookmarking or blog commenting. Forum links from relevant forums are still valued by Google. Getting a paid link from a high PR site or a link from paid reviews is good as long as Google can not find out whether the link is paid or not. Google also seems to be discounting do-follow comment links from blog comments powered by disqus etc.
Im concentrating more on Forums links and less outbound links, relevannt nihce, and high PR dofollow comments. But yeah must be done naturally, too quick if you go about it, than its a serious risk.
I sure it is Links from blog reviews. Because the IDEAL link is from the page of uniq thematic content from the site of the same them to the site you linking. So Links from blog reviews - is the most near to IDEAL link ....