Here's my trick when I used to make granny afghans: If you have to make 30 of something then you figure the percentage that you have made and the percentage that you have to make. So, if you are 70% done, you have 30% to go. Then figure out how much of that 30% you have to do to make it to 75% done and 25% to go. If you break it down, it keeps you going from milestone to milestone. (I used a cacklater as my son used to say!)