I listened to a presentation at toastmasters where a member talked about how to express your opinion. Here are some of his suggestions:
– Avoid debates.
– Be aware of potential problems that can create an emotional/negative response from the audience.
– If people don’t trust you will not trust the idea you want to share.
– Acknowledge the perspective of those who disagree with you.

Want to add to the list? Please do so in the comment section of this blog.