Are there ways to improve hub karma besides linking?

Yes, you can also improve it quite a bit by just asking and answering questions posted on the hub. I have recently noticed that my Karma points doubled just in the process of answering questions. WB.

The best way I found was when I finished a hub I would hit the button that says suggest links, then hook others hubs to my hub. That moved my karma very quickly.

I think commenting on people's hubs is a good idea because then more people with comment on ours.

It helps a little bit to raise hub karma. But, Contents has vital importance if you want to raise hub karma. Always write on hot topics and write longer(more than 300 words).

The more it will be searched and liked by the user, the more hub karma will improve.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.