Here is a selection of some really important Pali Suttas.
Deep bows to accesstoinsight.org.
Kalama sutta - to the Kalamas
which gives the Buddha’s recommendation as to the attitude one should take towards the teachings.
Then the 1st, 2nd and 3rd discourses:
1st Discourse - Setting the Wheel of Truth in Motion
The heart of the matter, dependent origination:
Paticca Samuppada - Dependent Origination
The subtle understanding of the ‘self’:
Ananda Sutta -To Ananda (On Self, No Self, and Not-self)
How to do it:
Maha-satipatthana Sutta - The Foundations of Mindfulness
Here are links to suttas I find particularly inspiring: