Another thing I need to keep in mind:
actions speak louder than words.
I think I do a pretty good job writing conversation, including situations where characters say one thing but mean the other. The trouble is that I tend to pad out the bits between conversations with thoughts, rather than actions. Even in the instances where I use actions, I like to write out the emotion behind them, as if that would somehow make them clearer.
Obviously I need to let the reader do a little of the work themselves, and just stop there.