I have a lot of lower back issues. They're different for everyone but I have a few things I do really consistently.

Yoga & low/no weight back exercises Icing multiple times a day (heat causes inflammation so even if it feels good it usually feels worse after) Seeing a chiro regularly to get adjusted, ultrasounded, and electrostim

Edit I totally forgot someone else said standing desk, that's key & one other thing, get a good chair for sitting. Something that really supports your back.