The Seven Factors of Enlightenment

1. Mindfulness (sati).

2. Investigation of states (dhammavicaya).

3. Energy, vigor (viriya).

4. Joy (piti).

5. Tranquility (passaddhi).

6. Concentration (samadhi).

7. Equanimity (upekkha).

See The Seven Factors of Enlightenment by Piyadassi Thera.