I have started keeping a dream journal - I have found by doing that the dreams I thought had no relationship to each other - are all very interconnected with the same theme - even though they involve different people and different situations
I would have to say I wasn't convinced at all before I started writing them down - they just seemed random, scary and weird. Now at least the random thing is accounted for ...
so I think dreams can be very powerful, motivating the kick in the pants some of us need to really make a commitment to more forward.