We need a sticky for this.
1. Always use a tripod
2. Always use either remote shutter release or shutter delay so your finger press doesn't shake tha camera
3. Never use flash
4. The easiest way is to use fireworks mode
5. If you don't have that use Landscape mode with flash turned off
6. If you want to go the manual route, I like ISO100, 2 sec shutter, f/10