As the saying goes 'THINK TWICE BEFORE YOU SPEAK', don't talk too much.
Excessive needless talking is usually a sign of nervousness or stupidity. Before you say something, ask yourself, “Is it true? Is it kind? Is it necessary?” Speak only if the answer to these three questions is YES.
Avoid talking about bad, unpleasant, destructive subjects. Instead, talk about the good things you’ve seen or want to experience. If you do have to mention something unpleasant, use tact and gentleness, find something positive to say to offset the negative, and be brief.
Praise liberally. Sincere compliments, thanks, and other appreciative words are always welcome.The more genuine praise you give, the more positively people will respond to you, the more confidence you’ll feel, and the more successful you’ll be in your life.
Finally, speak calmly and as much as possible, avoid angry words. Angry words create enemies, drain your energy, and make you ill