You may be surprised to learn that thinking, writing notes to remind yourself of things you need to do, and talking to yourself are all forms of intrapersonal communication. In this level of communication, you are both the person 'sending' and 'receiving' the message. Because you play this dual role, the chances of misinterpretation or miscommunication are essentially non-existent. After all, most people do not have barriers to clear communication with themselves!