Could you help me prepare a Vote of Thanks?

It's our school's sports day.I am the school leader and have to deliver a vote of thanks in the inaugural function.I'm used to it.I always prepare it myself but now when I prepare it,I feel a monotony.I use the same words and phrases like 'I would like to thank...' , 'I keep on record a special sense of gratitude to...' and so on. I would like to avoid that repetition found in all my speeches(vote of thanks).Could you suggest me something new ? And general guidelines on that?Thanks in advance!