One of the main concerns that bloggers have is getting links, the linkbaiting . A simple and quick means are the socialbookmarks (social bookmarking services), or exchange pages of web pages among the users of the system.
To facilitate the task, here is a small list of dofollow socialbookmarks.
Be good and do not fall into spam, will not they also change to nofollow these sites .
If you know more, do not hesitate to write it in the comments to expand the list.