I learned many essentials about digital photography and using a more advanced digital camera in the Nikon Talk Forum. Here are some of my favorite threads from the Forums. Also included are links to other Nikon-related websites:

Settings

• AE-L, AF-L settings
• Focus, metering, exposure value
• How to focus manually
• 5400 tele: What’s the best to expect?
• Difference between BBS and Optical Image Stabilization
• Obtaining shallow depth of field

Post processing

• Correcting Perspective Distortion
• Healing Brush
• Local Contrast Enhancement
• Motion blur
• Favourite Photoshop Tips

Accessories

External flash - and related stuff

Subject matter

• Carnival
• Photographing birds
• Sunrise vs. Stunning Sunrise

Nikon Support, Registration & Repair

U.S. Tech Support 24-7: 1-800-645-6689

Nikon Authorized Repair: 1-800-645-6678

Nikon websites:

Nikon Digital Tech Support Center
Nikon Worldwide Network
Europe Nikon
Nikon European Support Centre
Nikon product registration
Nikon Service Information

Other Nikon websites:

CoolPix Cameras
Nikon School
Nikon World