See the video below for a “trick” I like to use to help reduce the risk of back pain during the deadlift, after the individual has had enough practice with the basic structural set-up and execution of the deadlift.
Many people are great when it comes to finishing the deadlift with the glutes (“humping the bar”), but I’ve found that few people think about creating tension in the glutes before the genesis of the pull.
I've found this really helps people who complain of "feeling it all in their back" (even after achieving a neutral spine and good set-up) when they pull, and also helps them prevent from "hitching" at their lumbar spine.