HOW TO WRITE INFORMAL LETTERS

http://es.scribd.com/doc/12258697/How-to-Write-Informal-Letters

Letter writing is one of the tasks you may be asked to do this year . So, the more you practise, the better.
To start with,you can have a look at several model letters and then dothese exercises.

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

http://www.parapal-online.co.uk/letters.html