It's the time of year when there are a lot of fireworks displays but the really big ones will be coming up on the Fourth of July. Photographing fireworks isn't hard, but you need to pay attention to a few details.
Here is a collection of articles that have great advice.
Every year about this time Joe McNally posts an excerpt from the Life
Guide to Photography.
Scott Kelby also reposts his fireworks article every year.
And this is from the archives of the New York Institute of Photography.
Even though they all say basically the same thing, they all say it in different and entertaining ways. If you're hunting for a place to practice, check out the schedule for the Stormchaser's games at Werner park. They have fireworks at every Friday home game for the remainder of the season.