I too keep an electronic diary. I’ve created a folder called Quilting Journal in the Notes app on my iPad. Whenever I start a new project I create a new note. It’s easy to insert photos and when I’m finished the quilt I place a photo of it near the top of the file. Then when I go to my folder I see a listing of all my quilts with a photo. UFOs and WIPs are easily identified because there isn’t a photo yet and I document what is still left to do.
I wanted a simple process so that I would use it consistently.
This is what it looks like: