Answer:
Offer them fair compensation for their work, including profit-sharing and benefits. Refrain from compensating executives disproportionately, instead distributing profits more or less equally throughout the enterprise. Value everyone, and pay a living wage to even the lowest-paid worker. Reduce the pay gap between upper and lower levels. Reward productivity through individual and collective bonuses.
Why not give them a gift? Or have an employee appreciation day for each of your employees. Make them feel comfortable at work. Praise them when they do a good job, or encourage them to work harder.