The Discourse of Girimananda is a section from the Anguttara Nikaya part of the the Pali Canon. It addresses the monk Girimananda and explains 10 different types of meditation practice, the Dasa Sagna- Ten perceptive observations. These instructions are important since they are are spoken directly from the Buddha. The ten practices in headlines are:
the perception of impermanence
the perception of non-self
the perception of the unattractive
the perception of danger
the perception of giving up
the perception of dispassion
the perception of cessation
the perception of non-delight in the whole world
the perception of impermanence in all processes
mindfulness while breathing