This weekend a friend introduced me to iPhone's rotating lock screen background function and I adore it. You trigger the lock screen options by tapping to see the below:

Then you hit Customize and you can select a range of photos, you can pinch them to the right proportions, and pick the frequency - I go for hourly.

Its lovely to see a different memory every few times I pick up my phone.

Anywho, might be old news to lots of people but it was new to me!