Answering my own question: Point 7 in the previous post is:

Why do people say "I was thinking to myself"? Is there some way of thinking to someone other than yourself?

The answer is: Yes! It's called speaking. Notice that another way to say "I thought" is "I said to myself."

So go ahead, start saying things like, "I thought to her that she had some pretty strange ideas," and "Think to me whether I'm crazy."