This!!! Lately I've been in a slump, I've found that setting a 30 minute timer where I put phone on do not disturb, only have my document up on the screen, and write — not editing it as I go just write for 30 minutes straight — has helped. By the end of those 30 minutes I'm usually in a flow and try again for another 30 and so on.
I also like collecting quotes or photos (I use Pinterest) that connect to my story. It's a way of grounding me back into the world and a source of inspiration.
I used to commute 1 hour back and forth to work everyday and that time in the car by myself is when a lot of the building for my novel took place. So now whenever I'm in the car, it's reflexive almost for me to work out plot lines, dialogue, etc.