I found that i wasn't getting very far with my final edit. I only have 12 chapters to go and have made little progress this week. For something different i asked my husband to show me how to mow the lawns. It was quite refreshing doing something different that when i sat down to do some editing i whizzed through five chapters!
I fully recommend doing something completely un-writing related to get the juices flowing again. And my husband was really thankful too.