The Clone Source panel (Window > Clone Source) has options for the Clone Stamp tools or Healing Brush tools. You can set up to five different sample sources and quickly select the one you need without resampling each time you change to a different source. You can view an overlay of your sample source to make it easier to clone the source in a specific location. You can also scale or rotate the sample source to better match the size and orientation of the cloning destination.
For timeline-based animations, the Clone Source panel also has options for specifying the frame relationship between the sample source video/animation frame and the target video/animation frame. See also Cloning content in video and animation frames.