Never use “really” or “very”.
You sound too enthusiastic.
It was really great to meet you.
It was great to meet you.
Never use “think”. Use “believe” instead.
If you don’t believe it, don’t write it.
I think it’s a good idea.
I believe it’s a good idea.
Don’t apologize (unless you actually owe them an apology).
If you’re so sorry, why are you doing it?
Sorry to bother you, but I have a quick question.
I have a quick question.