The times are a-changing as the song goes.
Many webmasters, myself included, did not worry too much about getting inbound links to my websites. Why? Many of my sites were created many years ago. The earliest was in 1998.
But now I've lost ground because I did not pay attention to or even believe in the power of link building. In the old days we pushed "reciprocal linking". Then Big Brother Google told us that it preferred one-way incoming links, at least that is what I heard. (time to recheck with Matt Cutts)
Here is a fantastic article on the subject of link building, then and now.
How To Take Control Of Your Link Building In 2010
Website design and SEO promotion