How long does conditioning take to wear off?? plz help!!?

I have spent the last 6 months removing negative influences in my life. I am on facebook and like a lot of political things but I had to hide them so not to stress myself. I hid or deleted negative and mean people. Stopped worrying about things I can't control and started realizing that what I have is great. Being grateful for what you have helps. And ignoring those that stress and hurt and depress you helps too.