Any event like a workshop requires a lot of preparations. If you prepare well you will succeed surely. Here are the tips for how to organize a workshop:

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A Always pay attention to the age, educational and financial background of the people who are attending the workshop and prepare the content of the workshop.

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Try to find out the actual needs of the people who are attending the workshop as see what their expectation re from the workshop and then organize the content accordingly
Spread the contents of the workshop evenly over the duration of the event. Don’t try to give everything in the first half and then have noting much to say in the second half or vice versa.   
Try to ask questions from the audience from time to time to engage them and keep their interest alive.
Take feedback from everyone after the event.  

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