Making suggestions

Shall I / we... (do)?
Let's... (do).
Why don't I / we... (do)?
How about... (doing)?
What about... (doing)?
I think we should... (do).
I suggest that we... (do).
It might be a good idea if we / you... (do).
I think the best way of dealing with this situation would be to... (do).
If you ask me, I think we / you should... (do).
We could...