A little while ago I saw somewhere on the internet a tutorial on how to make custom shape bokeh. As I was putting a piece of thin cardboard into the bin today, I suddenly remembered the tutorial and decided to give it a go. I did a very crude version, though, so the results are absolute rubbish, but here are a couple of shots for now.
One of our bookshelves with fairy lights.
My trusty model with boketa fairy lights in the background.
Of course, when you take a vertical photo you should remember to rotate your bokeh mask... otherwise you get all your heart shapes lying on their side.
Well, next time I'm going to do a proper mask with a beautiful shape and some thought behind the image. Until then... try one yourself: here's a link to one tutorial.