I've found that a short (20 minute) commute can help a lot with this.

I'm actually serious -- the commute is like a palate cleanser between work and home. It helps even more when I ride a motorcycle, as the concentration on my safety totally wipes the coding from my brain, and I walk in the house with a clean slate.

But some people's work continues after the commute. Humanity is untenable; embrace the cold, unempathic autism. It is the only way.

Yeah I've seen some people that work from home mention this - the ritual or transition of going from work to home is something they miss. To a degree of course, I mean 20 minutes isn't too bad, for me it's often more than an hour which is a bit much.

I've found that doing anything distracting can help.

Commuting, listening to a podcast or audio book, playing a video game for 15-20 minutes, ...

Whatever takes your mind away from matters at work.