Here's somethings you should take a picture of with your phone...
so you will have it handy.
Your printer cartridges. Make sure you can see the refill numbers.
Travel confirmation numbers. Take a screenshot of the email your airline sends you.
Pictures of current medications. Make sure you can see the prescriptions' names and dosages in the photo.
A recipe from a book or magazine that you want.
The label from that wine bottle, they served and you loved.