The Google AdWords Blog announced a new and very useful feature for AdWords advertisers on how to manage their accounts without them actually having to login and make changes on a daily basis. The new feature is named AdWords Automated Rules and is currently available to some advertisers, specifically within the US.
The feature lets advertisers schedule automatic changes to specific parts of their account based on the criteria that they specify. For example, you can change your daily budget on peak shopping days or modify your Max CPC bids based on CTR or conversion rates or even enable ad text directing users to a promotional landing pages late on a Sunday night.
Google said this will gradually roll out to all US advertisers in the coming weeks. I suspect this will become a very powerful and popular feature amongst advertisers.
For more information on how to use this feature, see the help section. Here are screen shots on how to access the feature, followed by a video demo: