to give my opinions and ask for my friends opinions

ask:
1. what do you think about..
2. what do you think of...
give:
1. I think..
2. I don't think...

To give my opinion, example:
- I think...
- I must say...
- From my point of view...
To ask for my friends opinion, example:
- What do you think...?
- What is your opinion about...?
- How do you feel about...?