Late last year, Google launched a beta test of "Automated Rules" for Adwords - "that lets you save time by scheduling automatic changes to your account based on criteria that you specify," the Adwords Blog announced
"If you regularly log in to your account to pause or enable ads, adjust your bids, or perform other manual tasks, automated rules may be just the tool you need to manage your account more efficiently." There is a step-by-step guide to implement and get effective use of this new addition at Adwords Help Center.
Remember to check the rules once you have implemented to make sure they are doing what you expected.
For more on Automated Rules, check out "Automate Your AdWords Management with Automated Rules, Part 1" by Joseph Kerschbaum. Part 2 will be posted tomorrow morning so make sure to check it out.