What do you mean by: "Getting both the showdown and non showdown lines to incline "?

I've noticed I have some big leaks in non-showdown pots (its only slightly positive), do you think doing the HEM articles would help? For example I saw a graph of 20BuckSpin i think, and his non-showndown winnings are HUUUUGE. I'm more passive than him, but i'm not sure if I can settle for a "just positive" non-showdown line. What do you guys think?