I listen and advise
I place great emphasis on listening and understanding so that I know my potential customer's desire for a new direction. I listen before, during and after a change. All three phases are important for a good project - especially 'after a change' because it lays the foundation for the next phase. Doesn't everyone do that, you ask? They should, but in consultancies or in companies, listening can get bogged down in excessive internal conflicts of interest and the customer doesn't get the independent advice they deserve. When I engage with a customer, they get my attention 100% and without any underlying agendas. If we disagree, I'd rather stop so we don't waste our precious time.