I used to use a note pad and pencil when I went to the garden to add comments about the photos I took. Now I have learned to take photos and make a short recording (feature built into the camera) after each photo or group of photos. No more lost pencils, out of sequence notes, etc. Plus it frees up my hands to pull the weeds that so distract me as I walk through the garden.
When I download the photos to the computer, the recordings are also downloaded and it works out great for me.