With past Google updates in mind, not all links are created equal. You want to focus on getting relevant quality links pointing at your site. This means to stay away from guestbooking and most directory type sites. When you find bad links pointing to your site you need to try to contact them to have the links removed. When you have tried everything to remove the links and they still exist visit your Google Webmaster Tools account and use the disavow tool on these links to show Google that you do not approve of these bad links. Obtaining the good links can sometimes prove to be a burden but their are ways to do it such as asking different webmaster for a link to posting great user content that people want to link to. You can also come to http:blackwood.productions where we do all the work for you and get these quality yet relevant backlinks for you.