Which ideas, thoughts help employees to be positive at work?

Be clear while setting performance and behavioural expectations

Be transparent & fair while dealing with staff

Regular updates should be taken from staff and give inputs/support/tools/knowledge to him to remove any hindrance coming his way.

Do brainstorming sessions on a topic given to them for study.

Have a frustration/complaint box (not suggestion box) and have a session decided when common or serious problem is there with your staff and solve it accordingly.

Job enrichment, trust & empowerment will be good practice

delegate tasks to staff & appreciate them on every single achievement

Adopt SMART Goal strategy.

Keep a weekly/fortnightly lunch with staff together, where no work talks to be made.

do an outing once every two months

support your staff when they are facing unwanted situations by counselling, reducing burden sharing his activities with others for time being

personal note of thanks when target or goal achieved

appreciate your staff in meetings with reasons  - I want to appreciate and thank MR. ____ for.... Thanks MR. ___

You need to motivate them with some form of rewards. Moreover, suggestions have to be taken seriously so that employees are willing to come up with more creative ways of improving the workplace. 

I agree with Mr Shukri Mim

Thank you for the invitation

Work loving respect for career ranking respect worktime doing business entrusted to him and mastery on respect for colleagues advice and consultation to be compliant external changes

Thanks 

I support the answer given by colleague Akhter Gul 

Thanks for the invitation. I agree with the given answers.

Thank you for your invitation

Each greeting for all the interest and useful answers

Thanks for the invitation. I second the answers given by the experts here.

Employers hired them because they need, but if they do not perform well as asked for then there is no other chance to survive as well as no opportunity to make their dreams come true!

agree with all expert answers above

These are some ideas to boost up the positive mind  as following

1. Keep employees feeling their work is more than just a job.

2. Take time to creatively celebrate accomplishments.

3. Grant time off to employees to pursue projects they are passionate about.

4. Mix up the company's usual way of doing things.

5. Don't forget to have fun.

6. Train employees to develop positive attitudes.

7. Offer time away from the office to do some good.