Start your speech by thanking everyone for being present and for listening to you. Do not forget to thank the organizers, sponsors and all individuals who have arranged the occasion or function.
Be humble and say that you are honoured by the audience and the organizers. Convey your gratitude to all who contributed in your success by saying that you are pleased with what you have for example, you have passed your exam in top grades, etc.
Now you should share your feelings after getting this wonderful success. You should also include that it is an opportunity for you to express what you are thinking after the success.
Do not forget to include inspirational words in your acceptance speech. This is the most important part of a speech that inspires many from the audience to follow your footsteps.
Pay special gratitude to those people who have directly contributed in your success. They can be your parents, teachers, bosses or any other person. Also thank them for giving you a morale boost in your hard work.
Conclude your acceptance speech by thanking everyone who listened to you and thank the organizers of the event once again.