We love this DIY geometric photo web from The Caldwell Project. All you need is some string or braided rope, pins or nails and some clips.

For a simpler project, you could string thin wire in strips along your wall and secure at the ends and use pegs to pin up your photos in a neat line. 

To print your photos directly from your phone, try Polagram. Tried and tested, the prints come out beautifully and start at 29p a photo.