I have trouble remembering to document stuff for PL. Last week I didn't take any photos at all
Anyway, I found this great app that I hope will help. It has reminders to take a photo daily and at the end of the day it asks how was your day. It also asks what you dreamed in the mornings. It connects to social networks and adds your stuff from those. This should make documenting PL a breeze! So I thought I'd share 
Momento - It's available on iPhone and iPad. I'm not sure about android.
Momento - It's available on iPhone and iPad. I'm not sure about android.