In Bound Link Advice

I was hoping that you could shed some lite on how to do proper inbound link campaigns.

The search engines view these inbound links as a sort of popularity contest. The more inbound links you have, the more popularity votes you get, and thus the better your site, at least in the eyes of the search engines. This is known as link popularity and the greater your link popularity, the higher your ranking in search engines. There are, however, some rules when it comes to inbound links.
Relevancy, Direction, Construction, and Sender Status.
The Surgeon's Advisor Team

Can you explain direction and construction please?

Direction is an inbound one in which you’re not required to link back to that site in return. This, however, can be hard to come by. Many inbound links are acquired through link exchange, in which a site links to yours and you link to theirs.
The construction of a link can be very important. Text links are, by far, more valuable than image or banner links. The ideal link is a text link which incorporates your keywords or keyword phrases.
The Surgeon's Advisor Team

Is the relavency of the incoming link really that important?

The relevancy of your incoming links are very important. Links must come from sites which are relevant to your own. This means that any incoming links on your plastic surgery site must have something to do with plastic surgery. Links from sites with no relevancy to your own can actually hurt you.
The Surgeon's Advisor Team