@hadarshemeshenglish: Intonation is a big topic, but here's one quick tip: When you're stating a fact or sharing something you're confident about, your intonation should usually FALL at the end. Falling intonation indicates more certainty and confidence. Now, if you're actually unsure about something...it's perfectly fine for your intonation to rise! But many people do this even when they're making a statement, and it can accidentally make them sound less certain than they really are. So if you want to sound more confident, pay attention to how your intonation sounds at the end of your sentences.