Seriously

Please do not overpromise under deliver.

If you think you can't do it, just say it! You won't die ok.

No need to promise others and say YES YES YES. In the end? its all NO NO NO.

Worst part is when you wait till the very last minute, then only you said the job/task assigned to you is not completed yet.

What the F? (Excuse my language, but I'm really not in the mood and I hate irresponsible people)