Here are some tips to photographing fireworks tonight - and more!
1. Use a Tripod
2. Use a Remote Release
3. Frame Your Shot
4. Choose the best Focal Length
5. Select the right Aperture -finding apertures in the mid to small range tend to work reasonably well and usually work well to shoot somewhere between f/8 to f/16. A good starting point for aperture is f/11.
6. Get your Shutter Speed Right - Instead of choosing a shutter speed, set the camera to Bulb (B) which allows you to keep the shutter open as long as you want. Expose for the entire fireworks burst. You can even keep the shutter open for multiple bursts.
7. Set your ISO - Shooting at a low ISO is preferable to ensure the cleanest shots possible. Stick to ISO 100 and you should be fine.
8. Switch off your Flash
9. Shoot in Manual Mode
10. Experiment and Track Results