Dont b nervous!!!!!be as u be in home or scool!!!!do it in an attractive way that can make people glued on ur words!!!!!
last and foremost thing according to my suggestion include some poems in ur talks by involving the coolest characters u know!!!!!simple.....ppl wud definitely luv ur speech!!...all d best
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Try to dress up in a neat way that projects your personality. 
Be confident on the stage.
Write down what you have to say and rehearse it well.
Give ample time for the recipients to come up and receive trophies on stage and get down without clashing with the next one. 
Giving a brief description about each achiever would add value to the show.
Have presence of mind so that if some error happens unknowingly you can handle it without letting others know about it.
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