In a protracted review process, it is very helpful for you to be extremely efficient in getting subsequent drafts to your client. The minute you get off the phone or receive a marked-up copy, get to work, polish the next daft, and send it to your client. You want to position yourself as highly responsive and eager for your client to move on with his career transition. The fewer the delays, the fewer reasons the client will have for prolonging the process. In fact, he will probably be very appreciative of your efforts and do his part to keep the process moving as well.