I use Wikimedia Commons:
- 1. To contribute my own photographs;
- 2. To upload new archival images in the public domain;
- 3. To improve existing images with higher-resolution images, metadata, descriptions, and linkbacks.
I like putting photographs here, and I enjoy seeing them used in the wild. But please give credit when due, especially when royalties are not.
Reach out to me on my talk page if you have questions about appropriate use and adaptation.