How can I stop talking impulsively?

by screwing up enough. no joke. every time you screw up make a mental note of it. every time you make the same mistake, remember what happened to you the last time/times you made that particular or similar mistakes and again make a mental note. scold yourself in your head. over time you'll subconsciously reinforce that action as a negative and you'll naturally begin to stop making that mistake. it's a form of self conditioning and has been proven to work quite well.

You may not believe if I say that the spirits are the reason. Human beings are ruled by spirits but humans must learn to control and rule the spirits. Spirits possess people according to the mental state of the human beings and keep them in the same state until they are rejected and replaced by another. This is an all time phenomena occurring in all humans. Human beings are always under the influence of spirits. Certain situations and circumstances causes the possession of certain type of spirits. Often thinking and talking about bad subjects or bad imaginations even for fun can take serious turns on one who think and talk. All spirits (good and bad) have the dominating character. They can take you to the extent of sacrifice or suicide.

All of your activities, talks and even thoughts determine what kind of spirits you will have for your life. Only these spirits are the reason for the good and bad happening in your life. Generally spirits determine your destiny from your daily activities, talks and thoughts too. All knowledge, skills, emotions, feelings, interests and everything are spirits. Even thoughts are not your own. For example, when you want to take a decision on a subject, one after another they think and you just listen and choose or reject the ideas which they transmit to your mind through your brain in the form of thoughts. A human being during his/her lifetime is living with many spirits which have joined one by one since birth. All human beings are just unprogrammed robots made of flesh, bones, tissues etc., by birth and toys of the spirits for their games.

You must not leave your mind in it's own way. If you do, the spirit will take your mind for it's own, then controlling it is not so easy. First of all you must think and believe that it's not you. Then you must command that spirit both mentally and orally to go. Whenever you are possessed by that spirit (you can feel the force or an urge) you must control at once and stop it with the thought that it's a spirit. You may also instruct or condemn that spirit not to interrupt or urge like that.

I have more experience with this kind of spirits.

Remember always, Nothing will be remain here after quit except good credentials?

Recognise why you are impulsive in the first place if you would. The urge of wanting to socialise is a Bias subjected to the individual constantly since birth, for example since all day long you see people constantly interacting socially (conservation or other activities) this pattern is engraved into your subconscious more and more. I'd suggest you not socialising, whatever your decision you can try Cognitive Behavioural Therapy.