What are the HR strategies that will help an organisation to gain more revenue/income and save cost?

We can sum up one of the most important of (HR Strategies ) in one sentence: Development of staff to achieve the the required target in the company.

• To achieve qualitative development for staff and raise their competence and skill by the development of human resources in line with the requirements of the overall development, and this requires raise the possibilities of rehabilitation and training to include various types of occupations and levels of skill and competence • rehabilitation of the workforce to the use of technical progress and scientific revolution in the overall development process and make it in the position to contribute to the development of technology and indigenization and innovation.
• To achieve a balance between labor supply and demand in order to reach the optimum utilization of the labor force.

Hr Strategies are designed and developed to ensure that an Organization functions at its optimum best, keeping in mind changing times/trends/policies and proceedures.
Many Organizations today have designed custom(er) driven Strategies to ensure that Customers are catered to and maximum amount of Revenue/Income are generated.
  One such Strategy is Implementing Multiple and Rotational Shifts so that All Assets are used to their Optimum best.
  Another strategy is ensuring that the Organization's Processes and Working Proceedures/Systems are constantly upgraded in line with the Market standards and strategies.
  My favourite Strategy is as follows: Employees must be encouraged to and rewarded when they suggest methods to save costs in an Organization.

Thanks so much @Amal Mandhora" your answers are very useful.