And to round it up here are some links to online exercises to practice what you've learnt:
- http://www.englisch-hilfen.de/en/exercises/confusing_words/say_tell.htm
- http://www.englishexercises.org/makeagame/viewgame.asp?id=3423
- http://www.usingenglish.com/quizzes/83.html
- http://www.perfect-english-grammar.com/say-or-tell-exercise-1.html
- http://www.saberingles.com.ar/exercises/332.html
- http://languageavenue.com/advanced-english/advanced-vocabulary-exercises/say-or-tell-exercise-1-advanced