How to fit scene on the page

I often have this problem, mostly with interiors, where I start with the top and run out space so you never see the floor in my sketches. Something I am trying to be mindful of. So I did a few practise sketches from a photograph I took a while back. It's really about thinking about the "back wall" of the scene, whether I'm indoors or out, and the perspective lines forming an X from that centre. Now, I just need to remember that when I'm on location!