Sometimes one-way communication is a good place to find some inspiration. Journals, diaries, letters and one-way phone conversations can all expose so much character. In some of those mediums, characters can lay it all out there and get raw and honest.
Use some form of one-way communication to convey a character's circumstance and feelings. It can be parent to child, employee to boss, lover to lover, alien to home planet, whatever tickles your fancy.
If you're thinking that's a waste of energy that will amount to nothing, that's not true. Like with the Screwtape Letters or The Dairy of Anne Frank, sometimes entire works can be made from one-way communication. So pick a character and go. Get deep.
~ Signing off and sending out cyber hugs.