I read this book when I was very young, not sure how young - but it was definitely before I appreciated its importance. As humans we often end up taking more work than we could or ought to - just because of the fear or absurdity of saying No. If you haven’t read this book, I highly recommend it.
Of the first 9 business meetings I had after moving back to India, none of them said "No" to me - and yet nothing good came out of them. And then finally, My first "NO" arrived in the 10th meeting. And in an weirdly ironic and somewhat sadistic way, it felt wonderful.
Please do yourselves and others a favor. Just say NO, if you are not going to do it.