Curating Content
the part that boosts your relevancy
Another good strategy is to look for trending news in Google News for your niche. Of course it isn't always possible to get enought sources with this technique. If this is the case you want to look for high authority sources to complement your list of sources.
This is the core element of the system. This is the part that boosts the relevancy of your backlinks. I always look at the DA of the sites I am curating from.