I have always looked at depth of field photos with some jealousy. To the unskilled like myself, they seem well out of reach of the normal user and by all accounts you need to fiddle about with the settings on the camera to achieve good results.
Turns out I was wrong. This is one of the easiest effects to achieve. My results are pretty ordinary but if I had kept going I could have done better. The simple solution is to find an item with a background you would like to be out of focus. Stand away from the item and zoom in to it, the further you zoom in, the more out of focus the background becomes.
No prizes coming to me for any of the examples I have put on here, but you get the point
Another
And another, I am flying now...