It partly depends on the item. If it is soft, or sew-onable, you could add the symbol of mercury, the planet of communication. I would maybe use symbolism with the charging, like wrapping it up in a page of written dialogue.
You could carve the mercury symbol onto a blue candle, and burn it while holding the wrapped item, and chanting something along the lines of "we speak, we listen". The chanting itself will help, as it uses the throat chakra, which is the chakra of communication. If you are able, you can utilise this, and charge the item from throat chakra energy. That's a rough idea, your own creativity will make the spell, of course :)