Business emails can follow this format:

If you know the person's name: 

Dear (name),

If you don't know the person's name:

Dear Sir or Madam,

In the body of the email use formal English and check for grammar and spelling mistakes. 

Thank them for their time. 

At the end of the email you will write:

Best regards,

your name

You can use several phrases for the signature like: sincerely, best, yours truly, many thanks, etc.

Here's an example email:

Dear Sir or Madam,

[write your email]

Thank you for your time, and I look forward to your response.

Best regards,

John Smith

Hope that helps! And I agree with Forest's correction of your question. Should be "keep"

Hmm, well, business emails are typically something you should write on your own, or hire someone to edit. But we can help you improve your English skills so you feel confident enough to write them on your own!

Maybe give an example of a business email you wrote.

As for your question, here is a correction:

Help me to write Business Emails

Can somebody please help me write business emails. Or let me know which things you should keep in mind while ("when" might work better here, but "while" is OK too) writing an email.