Letters are written to convey the messages and information in a planned way.
However, there is a huge difference between personal and formal letters.
Formal letters will be read by clients, business associates and other parties who can doubt an individual's professional competency by going through the letters.
Thus, it becomes essential to sharpen the writing skills in order to become competent enough in preparing a draft of the business letter flawlessly.
If one wants to make a positive impression on the other person, it will be sensible to state all the essential points in different paragraphs.
Moreover, the language should be understandable and able to convince the reader to take a prompt action.
There are different ways of presenting the business letter to a client, dealer, supplier, financier, banker or business associates.
Each type of letter is expected to be written differently so that it fulfills different requirements.
A businessman should know the right way of writing each type of letter.
Here are some important points that could help in making long-lasting impact on the recipient, irrespective of why the letter is written:

• Prepare a plan: In case of a business letter, it becomes difficult to rectify the mistakes or change ideas after the letter has been completed.
  Thus, it is good to carry out deep research and plan the things before preparing the final draft of the letter.
  One should not write a letter in a hurry...
  he/she should spend ample time so that it is written correctly.
  
• Write from the viewpoint of the reader: Since the business letter is meant for presenting some information to the reader for his/her convenience, it should be written from the reader's point of view.
  The letter should be convincing and reflect one's positive attitude.
  
• Collect all facts and figures before writing: If one wants to write a remarkably fine business letter, he/she should supply authentic facts and figures which will help in reflecting his/her professional competency.
  
• Politeness is the key point: The language used in the business letter must be soft and the content written must be free from slang and grammatical errors.
  If one wants to be strict with someone, even then he/she should choose the words diligently.
  A businessman is not expected to end up the relationship with someone in a bad way, because it will tint his image in the market.
  Therefore, one should learn to balance his/her emotions.