If you want to be heard, wait for the right time. As Ecclesiastes 3:2-8 puts it
"A right time to shut up and another to speak up"
It requires patience and observation skills to wait for the right time to start speaking. Sometimes it could be an answer to a question or a reply to a letter, but serving it at a wrong time will be disastrous. Yes, I used that word "disastrous" because ignoring the circumstances will have bitter consequence. Sometimes we feel sorry about what we spoke or wrote under a tiring circumstance. "Oh, I shouldn't have talked like that", then we apologize. Although an apology can turn the situation lighter, the damage is sometimes irrevocable and permanent.