Keyword stuffing does not prove beneficial when it comes to creating a good web presence. Keywords must be used in such a way so that they go with the natural flow of content. If you try to insert keywords that are not related to the content, then those keywords are not going to rank, besides people will also not click on them.
The techniques mentioned above is good however in order to get the right results, it is important to post informative and valuable content. Also, select authoritative websites for publishing the content and getting backlinks.