Stop listening to toxic people.

toxic people are convinced that everything is impossible, and they are quick to shoot down ideas. They’ll poison your mind into a state of hopelessness.
Don’t let them steal your energy just because they’ve lost theirs.
Instead, surround yourself with supportive and passionate people who can both inspire you and bring out the best in you. You can find them among friends, family, books, or blogs like Tiny Buddha.
They will lift you up when you feel down and help you see the bright side of your darkest fears and doubts.

If you accidentally overhear some stuff that doesn't concern you, don't spread it around. It might be fun news for others, but you might be hurting someone. Act oblivious to some incidents or as if nothing was overheard and get back to your work.

 When a person is humble enough to accept that other people are eligible to have their own viewpoint, that person is minding his own business. In the modern world, every human is born free and is free to choose how he wants to live his life and that should be nobody else's business unless that person is morally or socially wrong. After all, the world's a democracy and that way, everyone is allowed to slap a person who has forgotten to mind your own business

As I said, minding your own business needs a lot of humbleness, politeness and respect for the other human being. It needs an understanding on your part, that the other person is an individual with his particular set of choices, and he/she is free to follow his/her choices. You need to understand that you are not always right and playing Miss Know-It-All or Mr. Know-It-All will take you nowhere and will in fact, take the other people away from you. So, the mantra is "Live and Let Live". If you think you are the goddess of fashion or a finance guru, keep it to yourself, because you know what, the world doesn't care and nobody has the time to listen to you bragging and boasting. Also, you may not always find a humble listener. So, beware of witty comebacks before you open your mouth.

All my growing years, I have come across various people who lack the quality of humbleness. And I have noted that these people are somehow obsessed with boasting and also hint low self-esteem. Otherwise, why do you need to be so loud when making a point so that the whole of the room notices you and not just the person you are talking to. Or why do you need to say sentences like, 'why are you wearing this dress' or 'I got a job, pays big bucks, blah blah', when all the other person is doing is playing friends with you.