I've started sharing some dreams with my T where I've thought it might be relevant. I think it's been a good thing. It wasn't something either of us consciously decided we would work on - I happened to mention one in some journalling I did and showed her (I guess her positive reaction to it made me think she'd be open to that kind of thing), and then when she featured in a dream I spontaneously decided to email her about it... that led to some important discussion... and we went from there. (Of course she might soon tire of this, sometimes I dream a LOT - and of such random things. )