These tips are for casual point-and-shoot photographers:
These tips are for advanced amateur photographers:
Advanced amateurs should follow the general advice above. However, use the lowest possible ISO setting, the most depth-of-field and manually meter the exposure. Use an electronic or manual shutter release cord to avoid camera shake.
Advanced amateurs can introduce additional creative effects to make images shine.
A popular option is to make one out-of-focus exposure and sharply focus for the second exposure. This creates wide glows around the primary lights. Repetition of pattern can also be accomplished with double exposures. Experiment with them all.
Enough for now,