How can managers increase job satisfaction ?

• applying open door strategy
• a well prepared and established payroll & benefits program
• make social activities 

Job Satisfaction is the key Element for every Efficient Activity in the organization ... so if your employees feels Citizenship Behaviour and organizations is fully trying to satisfy the employees needs then it will leads towards the Job Satiisfaction .... it can be Achieved through Bonuses, Performance Appraisals and encourages them towards their tasks ... 

A manager is an  employee too, what makes him get satisfied?

Only by bettering motivation system

When you are a manager, one of your jobs is to motivate and develop your employees to improve job satisfaction. If you want to improve your own productivity, you should also be concerned with your own job satisfaction. There are ways in which managers can monitor activity and develop plans that will improve their own performance.

Goals

Employees are motivated by performance goals, and they find pride in achieving or exceeding their goals. Managers should also make goals designed to bring personal and professional satisfaction. For example, if as a sales manager you get a quarterly bonus based on revenue numbers, then set a goal to exceed those numbers and claim a larger bonus. A manager can also set a goal to increase departmental production to get the executive team to allow for necessary upgrades and changes to departmental equipment.

Get Subordinates Involved

Managers who feel the need to perform all of the administrative and managerial tasks for their departments on their own are adding to their own stress and alienating their staff. Learn to get your employees involved in making daily decisions by empowering employees to develop their own work methods. Have a weekly staff meeting where the employees give input on solving departmental issues. Your employees will feel a sense of involvement in the success of the department, and you will have reduced your stress and gained the satisfaction of improving employee development.

Take Breaks

The stress of being a manager can drain some of the sense of satisfaction you get from departmental and personal accomplishments. Taking breaks throughout the day is a simple but effective way to avoid overworking yourself and allow yourself time to collect your thoughts. Your job satisfaction improves because you are giving yourself a chance to relieve stress as opposed to constantly feeling the need to work.

Training

To get more out of yourself as a manager, you need to continue your educational and professional development. Industry training and advancing your educational background can help you to contribute more to your team. You can also improve your own career path by maintaining your own personal development.

I fully agree with the answer been added by EXPERTS................................Thanks

The biggest cause of Dissatisfaction among any employee is to have a Manager who is Unworthy of being his or her superior. So the first thing a Manager should ensure that he or she consistently upgrades himself to be viewed as a Credible Manager by his colleagues. 

I generally practice2 things while Managing people:

1.Make the business running a Transparent one (as much as possible) and clearly making everybody understand how impactful could  could be the contributions of each and everybody and how they can create a bigger and better impact to the business in their own capacity.

2. I say and most importantly practice the the phrase "Whenever you land in a problem which you can not solve, you will always find Me behind you". Thus I share their Failures also if it is genuine and unintentional. 

Agree with the other Expert's answers....