You do almost everything to write a good post and be a good blogger. Start from collecting all the information, writing, link in and out and others - you do to perfecting your blog usability. That a journey to be a great blog. For SEO, text link are important these day, exchanging link with other blog are one of the most common way to get them. Howewer doing a link exchange with bad site will effect you also. If the site penalized then you can have some detrimental results.

There is a Link Checker Tool that can help you determine all the sites that link to you and make sure that site decent. This tool will scan all link on your website and flag the result with possible problem.