The dreaded ‘lay’ vs ‘lie’

I use a piece of software to produce images for this site, social media, my newsletter and other things. I love it, and smile at the short straplines it comes up with each time you download an image. That is, except for the strapline which talks about ‘laying’ on a couch. No no no! What is this person laying? An egg?

When even the professionals get it wrong, what are us mere mortals to do? In looking at this, I had a light bulb moment – it helps a lot to understand the difference in meaning betwe...