Photographic techniques:
Composition; Viewpoint; Focusing and Depth of Field; Metering; Light; Back-lighting; Flash

Photographic equipment:
The 35mm Camera; Digital Cameras; Lenses; Tripods; Filters; Reflectors; printers; computer monitors; LCD projectors

Plants versus Gardens:
Plant Portraits and Close-ups; Vistas; Panoramas

Weather:
Rain; Mist and Fog; Snow and Frost; Temperature

The Changing Seasons:
Spring; Summer; Fall; Winter

Using Your Work:
Presentations; Selling Your Work; Working with Publishers; Organizing Your Work

Organizing and storing your images:
Moving images from camera to computer
File storage and backup
Making hard copies of photos

Using photo imaging software to adjust images:
Adobe Photoshop and Elements
Cropping; sizing; color balance; light adjustments; selections; layers; optimizing (gif vs jpg); smoothing; feathering; special effects (filters); etc.