How does one reach a state of enlightenment in Buddhism?
In Buddhism, the path to enlightenment is achieved through the Eightfold Path, which is a set of eight principles for ethical and mental development. The Eightfold Path consists of:

1.  Right Understanding
2.  Right Intent
3.  Right Speech
4.  Right Action
5.  Right Livelihood
6.  Right Effort
7.  Right Mindfulness
8.  Right Concentration.

Following the Eightfold Path and practicing the Four Noble Truths and the Noble Eightfold Path leads to the attainment of enlightenment, which is characterized by the complete ending of ignorance and craving, and the realization of nirvana.
Are there any alternative schools of Buddhism that have different tenets?