I would like to share these tips with you; although I have a short experience in teaching (from September 2000), I came to create these tips out of my continuous efforts to change my ways of teaching in order to promote my young learners' level in English as a Second Language. Any constructive comments are warmly welcomed.

Ten Tips for a "Successful" Lesson

1) Read the WHOLE lesson you are going to teach and OUTLINE the linguistic components (lexis, grammar, structure...etc).

2) DECIDE the objectives of your lesson.

3) REORDER the objectives according to their importance.

4) PREPARE your guiding questions.

5) LOOK for prompts, visuals, games, puzzles, crosswords,... to support your objectives.

6) REORDER your activities / exercises in the ascending order (from the easiest to the most difficult).

7) LOOK for alternative activities in case your learners might not comprehend the main activities. This is more practical with grammar (e.g. when teaching abstract  rules).

8) DO NOT be a slave to the textbook / workbook. The book designers usually look at learners from their "ivory tower" and they try to experiment different methodologies and approaches neglecting the truth that what may "succeed" in a country does not necessarily "succeed" in another. They are always theorizing though pretending to be very practical.

It is YOU who is ALWAYS in the classroom, YOU who Teaches, YOU who Tests, and YOU who Evaluates!!! So, it is YOU who must DECIDE what you see as the most appropriate to your learners provided that you RESPECT the objectives outlined by the book / syllabus designers. You are FREE to CHOOSE the activities, REPLACE some with others, ADD yours just for the sake / benefit of your learners.

9) INTRODUCE the item (vocab., grammar...etc) through visuals, flash cards, prompts,... then, PUT it into PRACTICE through activities, tasks, exercises..., and finally TEST it through puzzles, crosswords,...

10) LOOK BACK at your previous lessons, ASK yourself whether you fulfilled your goals and, if not, avoid the "mistakes" you made. This is a kind of self-evaluation in order to better learners' feedback. The output depends on the input. Keep in mind that it is not a disaster to make mistakes But it is a disaster to CONTINUE making mistakes without any effort to avoid them.

http://www.teachingenglish.org.uk/forum-topic/how-prepare-a-successful-lesson