Now you know the different parts of a formal and an informal letter. In this new table you should include some examples of the these parts that are important to remember when writing a letter.

http://www.parapal-online.co.uk/resources/letters.h

http://www.writinghelp-central.com/sample-letters-personal.html

http://www.uni-koblenz.de/anglistik/subjects/praxis/wri/models/informal.html