That is the buzz! It is thought that G is moving to author rather than individual content rank. If you have a good reputation with a lot of psitive social buzz then anything you write from then on should have a better chance in the serps than something written by someone with no reputation.
As far as interlinking - since it is you doing it, and G is likely to know this, the amount of reputation you pass from one to another will be limited (or at least G will limit it). However, if you want to associate similar content to your overall brand then there may be some positive impact in the long run, as long as both articles are top quality.
Your best bet is to generate some social signs and hope that a buzz ensues. I would tweet all your articles regularly, but at different times of day - tweeting just once is like placing a stone into a lake - it will make very little ripples. What you need to do is tweet as if you want great waves to ensue. And for them to break on shores far from where the rocks were chucked in.
Have a look at my Twitterfeed article to get an idea of how you can do this with little more effort than doing it once.
It is now also imperative to utilize G+, as much of G's idea of what buzz is associated with you will come from there.