Which can help you in that sport to have a good and positive connection with the game and the sport. Before you have a big meet you always should eat right. Which can give you extra strength and help you during your activities. Try to drink as much fluids as possible so you don't get dehydrated. Power bars are a favorite snack for most teenagers to eat during the day, before a race or an event.
Most sports have some team effort involved.
You should always have a good attitude with your teammates. It will give you some team spirit for you to think positive to do your best. Everyone in their life time has a bad day. Even people in the olympic's can have a bad day. If you ever have one of these days you should just take the bad anger in you and try even harder to succeed in your next meet.