Becoming a first time manager, what kind of mistakes I might make and how can I avoid them?

The most important mistakes are :

• The firmness
• The selfishness
• Arrogance
• Come late 
• Haste
• Bad communication
• Nervousness
• Being too strict
• Being too harsh
• Do not delegate the responsibility for its employees
• Let overfilling by work
• Accumulate the work
• Want to order rather than motivate, animate and direct
• Rush to make a decision
• Work alone
• Do not listen to the employees, their opinions, their suggestions, testimonials.

To avoid these mistakes, you must :

• Be disciplined
• Manage your time well
• Manage stress
• Delegate the reponsibilities to your staff
• Learn to communicate better
• Try to be more flexible
• Try to be calm
• Self-control
• Give voice to employees, listen to their problems, their testemony. their advice and their suggestions

- judging things wrongly

- nervousness

- bias

- superiority complex

- favouratism

to avoid. inculcation of firmness, sincerity and discipline within you and your team. deveoping an habbit of investigation and upon acting.

above are the few things which sure need to look into. Thanks.

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Thanks for the invitation, I  agree with all answers

The first time manager is prone of bypassing rules or guidlines of certain intity which somehow not all intity has an identical guidline or rules depending on its thrust and vision and mission. In other words, new manager should difinetely review the guidelines or rules of the organization before to make a decision in behalf of the company or organization. The most common mistake of managers is abuse of position  that in a way drag the company into obscure and chaotic  management. To avoid it, first time manager should always take a look his role as manager and reason why the company hired him/her to handle the position and the job with a thorough observance of the guidlines or rules as basis in making solution and fair decision. 

A first time manager's common mistake is showing nervousness. When someone see you nervous on the job, it connotes weakness and it is not inspiring. To avaoid being nervous, start strong and get yourself busy and occupied.