How to Get: three Way Links blog commenting directory submission article writing yahoo answers bookmarking ???
methods you listed will give you one way links which is lot better than 3 ways. you can read this article which explains few popular link building methods
You can't get 3 way links from above resources, you can get 1 link from that resource. 3 way link exchange is Site A is pointed to site b and site c pointed to site a or any other site. For getting 3 way links you can search in forums and ask to webmaster..
You probably want to understand what is 3 way links. It is when site A links to site B and site B links to another site (either A or C)
the best way for getting 3 way links is link exchange - but it`s not so simple as in the case of ordinary exchange