If you are not geotagging images, location-based file structure or naming conventions are also worth considering. Most useful for separating personal / jobsite / public garden pictures, but also allows me to selectively backup what is most important. For example, - client garden shots get uploaded to dropbox in dated subfolders to be shared with client - good photos of plant species/cvs get backed up full size on external harddrive regularly (filed by genus only unless it's a collection) - random snapshots of my garden are backed up less aggressively. Convoluted but helpful if space constraints. It is not only a storage consideration, but limit of processing power if you have an inexpensive computer (Picasa completely overwhelms mine and searches of too many files in one folder takes forever). Use automation for sorting and naming whenever possible. I have found iWatermark Pro (multiplatform) very useful for renaming and/or modifying EXIF data -- can do large batches of photos very quickly. Originally purchased it for it's bulk watermarking and resizing, but found other features useful as well. Terri Bates Maple Valley, WA, USA Zone7b (forest and foothill-influenced microclimate near Seattle)