Changing your thinking pattern for the better can be a rough job as we, human beings, are hard wired to survive, meaning we are constantly on the hunt looking for some dangerous and negative things that can hurt us. That's how our ancient brain was made to think, if we want to be happy, new neural pathways needs to be created. This, you can only train yourself to attain. Treat your brain like a muscle and exercise it to the point of a deep constant knowing, feeling and sensation of content and gratitude. Yes, this is possible.
And, when other people manage to do this you can too.
It can start as simple as this;
When something that seems bad in the moment happens to you, how often do you ask yourself what is the gift in this? And.. How do you even know that an event occurring to you really is negative?
Because it doesn't have to be. Failure, unfavorable, big and small mistakes, heartbreaks, illness, a bad email or phone call, or someone talking behind your back, someone bullying you, being broke, or saying something ludicrous and ridiculous to another person, or simply not getting what you want etc. Whatever you can think of that makes you not feel good about yourself. When you think about what happened, replace all depressing, frustrating, angry, thoughts with:
"What are the teachings, whats the guidance coming out from this? Really, what is the gift in this?"
Just do it. Let me know how it goes. Keep doing it. Because everything is really a gift, I might sound religious if being a kind and grateful person is what you associate with religion (which is absurd in the first place). Life itself is a gift and we all need guidance to get better at being who we are supposed to be and to serve ourself, others and earth as we are supposed to. So follow the signs to become a better human by saying, what is the gift in all of this?