I say we go to the beach tomorrow.

It is not too much to say that she is the best singer in the world.

I dare say he will be late again.

As I was saying, we need to focus more on our marketing strategies.

As the saying goes, "Nothing ventured, nothing gained."

I would go so far as to say that she is the most talented person I know.

I guess you could say

I suppose you could say that I'm a bit of a perfectionist.

She expressed her disappointment without saying a word.