His careless actions only make it worse.

How did it go?

To whom it may concern,

Now that I think of it, I should have studied harder for the exam.

Now that I think about it , it was a big turning point for me.

Now that you mention it, I do remember seeing her at the party.

We're running late, so step on it!

This rare coin is a collectors item.

You can leave it as it is.

Come to think of it, I forgot to buy milk.