Complaining Rewires Your Brain for Negativity
inc.com
inc.com
The only way to eradicate chronic negative thinking is by not thinking at all. Shut down the inner monologue completely with regular meditation. It works for me.
EDIT: I use these meditation posters to instill a positive message subconsciously while I clear my conscious mind: http://zenpusher.com
But by far the most effective is other happy people.
If you train to find the downside in every situation, you will get very good at it. But you can also train to find positive aspects in every situation and you will get very good at it too.
My response boiled down somewhat but same as yours, 'What you do. You get good at'