I forgot... I use my iPhone as a video camera and a still camera.
I love the grocery shopping app on my iPhone.
It used to be, that when I dropped into a grocery store on the spur of the moment, I would have a hard time remembering which staples I would soon need.
Now I (always) have my iPhone with me, to remind me. I'm even using one of the "grocery lists" to keep track of items I wish to buy if I happen to come across them at a low enough price.
Having the phone helps "absent-minded-me" make life better for me and for my family.
I also have some real estate apps (we're looking for a home) and some craft store apps on my phone. I can look at crochet patterns to get an estimate of how much yarn to buy, when I come across yarn that is really attractive.