It's fine to post links to your own blog, but try to make sure that you also post links to other blogs/websites that will be of interest to readers and other commenters. This will serve to prolong and extend the discussion.
I think this should have been written as a warning...
Something on the order of... Be careful about posting links to your own blog, or other sites, lest your post be seen as spam. Having a link back to our own sites is generally acceptable in the name address field... more than that should be carefully considered.
Also... Not sure about his entire thesis about getting much traffic.
Commenting regularly on blogs can build relationships with the writers, and particularly on target replies may get a bit of visitors as well, but personally, I've found that traffic to be fairly limited.