Just your speech could change the world for you, if not for anybody else.
Be chirpy, smart, and forgiving.
Please do not be very serious all the time, and do learn to crack a joke or two even if you don’t know too many wisecrack speeches.
What’s also important is that you should be generous in your praise for others, and shouldn’t find too many faults or shortcomings in others.
Do learn to be quiet when most necessary.
Enjoy, take time off for some sports or exercise, and complete your work well in time.