Backlinks Found in Forums
Generally search engines index forums so posting in forums and blogs is also a way to get quality links with the anchor text you want. If the forum or blog is a respected one, backlinks are valuable. However, in some cases the forum or blog administrator can edit your post, or even delete it if it does not fit into the forum or blog policy. Also, sometimes administrators do not allow links in posts, unless they are relevant ones. In some rare cases the owner of a forum or a blog would have banned search engines from indexing it and in this case posting links there is pointless.