I dry fire daily, a lot. I use a window and set up back from it enough so that it's not visible to neighbors but I can pick reference points to aim at. I don't practice dry firing in prone position, everything is from a barricade. I just use a wooden ladder and shoot every position, practice transitions, practice target acquisition, practice weak side and strong side, practice shouldering the rifle firmly, practice free recoil, try out different bags, try out no bags, mess with tripod rear support sometimes, always try to make every trigger pull perfect and have the reticle stay on target with follow through. Only time I'll do prone dry firing is to practice setting up fast and getting on target both weak side and strong side, trying to get time from standing start to breaking the shot under 8 seconds.
I'd love to be able to maintain a ratio of 1:1 dry firing to live firing but I can't get to the range that much. Still need lead downrange to really have complete quality practice.