Professional "Thank You" Business Letter: Why and How?

To best your economic resources, there may be a time where it would behoove you to say thank you, through a professional business “Thank You” letter. That impression allows you to keep the integrity and value of your network, and the more valuable your network, then logically, the more you would be able to optimize your resources. 

Example “Thank You” Business Letter [Brackets indicate where you must fill in your information]: 
[Your Name]
[Your Street]
[Town, State Zip Code]
[Your Cellphone Number]

[Current Month, Year]

[Name of Recipient]
[Company Name]

[Company’s Street Name]
[Company’s Town, State Zip Code]

Dear Mr. or Mrs. [Recipient’s Name]:

I want to take this opportunity to thank you for your impeccable guidance, sincere affability, and leadership during my tenure with [Company’s Name]. Your wisdom and direction resonated throughout my time, and it is appreciated, as you helped me develop and sustain new lessons and capacities. Ultimately, you taught me proper principles, which helped my maturation and development within the [Your Industry].

The experience would always be memorable, and I genuinely thank you for giving me the responsibilities and freedoms to make a difference. [Here you would describe specific projects or assignments that helped you grow as a professional].

I also want to thank the entire staff within the department for taking the time to share their expertise and knowledge. [Here you would describe specific examples on how your team helped you].  

Nevertheless, I appreciate your alacrity of having my best interest in mind, and in the above reference, you will find my contact information so we can maintain communication in the future.

Kind Regards,

[Your Full Name]

Takeaway: 
A professional business letter would keep the integrity of your network. Therefore, you can use the above format, to help optimize the best version of yourself.