It's something I bang on about in my crit. of nearly every still life shot to be honest... for me, to make a still life shot truly succesful, it should be like a single frame from a movie, that tells the story of how everything got there.
I've typed this so many times now, but a good way to make something "hang together" is not to start with a pile of props and throw them together in an appealing geometric pattern - but to start by "writing a short story"... in this case, for me it'd be something like this....
"Got back in after walking the dog this morning in the rain, drenched and cold, so I fancied something to warm me up - a nice mug of coffee, with a splash of "something stronger" in there... and, as I waited for the kettle to boil, I noticed my better half had made/sourced mince pies... don't mind if I do... Right couple of them on the plate as well, off we go, feet up in front of the fire with the Christmas Tree twinkling away in the corner..."
it kind of writes itself as to what the composition would be... plate, couple of mince pies (one whole, other with a bite out of it), crumbs on the table (not the plate) and the mug with steam rising (that can be tough in itself...)