I write my article in full - keyword focussed of course.
I then simply remove the last paragraph from the article and that becomes the resource box. I add the 2 links to this paragraph.
My early articles has dreadfull resource boxes like "Kenj is a writer about XXXXX and you can read more here." The new boxes seem to flow much better to me and the click through rate I am getting is around 20 -30% now instead of 6%.