Technique A: Two-Step Stampin'
1] Stamp the base image.
2] Position and stamp the overlay or adjoining image.
Technique B: Repetition (Stamping Off)
1] Ink a stamp.
2] Stamp the image.
3] Restamp the image one or more times without re-inking it. This technique is a great way to get several shades of color from a single ink pad.
Use lighter ink for the base image and darker ink for the overlying image.