Performance of organizations is a desire of every manager. how can you increase employees performance?

By giving them the rewards of their (employees) assignments.

well.... maybe by creating a idealistic or unique performances. 

First the management team should become an example, it will really become an intrinsic motivation to employees, then through incentives, commissions, rewards (monetary and non monetary), and also by providing  training.

And the main thing is giving support, value and appreciation to the ideas generated by tthe subordinates or employees, it will be a most effective motivation. 

First you need to set an example by performing well yourself. It's really motivate an employee to perform well. Other factors to motivate an employee in his/her improving his performance efficiency include:

a- Training and Education Support

b- Work appreciation

c- Monetary Reward and Promotion

To make it short.

Training and Rewards.

by enhancement and supporting all time

employee engagement is one of the best way to increase the performance