Confirmation bias is definitely an interesting concept to consider.
We are taking in so much information every day - that the mind does need some short cuts and sticking to well worn paths (otherwise I imagine it would use up too much of our energy reserves)

Confirmation bias would work well with something like a gratitude practice. At the end of each day writing down 3 or 10 things we are grateful for. This gets us in the energy of gratitude, it feels good and what we focus on, expands.