Let's get down to business.

Let's get down to brass tacks and talk business.

Let's not deviate from the subject.

His story departed from his main theme.

In order to distract the others, we brought up this irrelevant issue as a red herring.

Anyway, to get to what I wanted to ask you...it's about the party. Are you free Friday?

I think it's about time we got down to brass tacks.

We have been discussing minor matters; it's high time we began talking turkey.

The speaker wandered away from the subject.

Now let's return to the main problem of education.

Well, let's get down to business.

Here I want to bring the introduction to a close and get to the real subject.

Let´s get straight to the point!