Are you spending too much time with repetitive tasks in Photoshop? Photoshop actions enable you to record a process and save that information as an action which you can then use for other tasks down the road. Not only that, you can edit actions after the fact and customize them to suit your needs.
While you can make an unlimited amount of actions, including color correction, below is an example of how to resize images ideal for Powerpoint. Take some time to plan the steps of the actions before recording.