I recently went to the supermarket armed with my paper and pen to record the prices and units of all the items I use when my cell phone rang. That's when I remembered I had a camera on my cell phone.
I went around taking a picture of all of the labels of the items I use and when I got home I was able to make a list at my leisure. It was a lot easier and less time consuming then hand writing them all in the supermarket.
It was fast and easy!