DO: occassionally give personal anecdotes that relate to the situation to show that you are human too and can understand, to a degree, what the person is going through.

DON'T: make it all about you

DO: Guide the conversation and pursue avenues that you see as important.

DON'T: insist that one avenue is the root cause of everything and insist on bringing it up all the time. Sometimes people aren't ready to go there, and other times they feel like they've been there and done that, but cannot articulate that they don't want to continue in that vein.

Obviously you wouldn't be the type to throw pills at a problem OR insist that it's just a moral weakness/character flaw on the part of the patient.

I have no other advice. Other than I always thought you'd make a great psychologist.