I have been dry-firing for about an hour a week using snap caps. The DA pull in my Beretta is very heavy but I want to see if I can learn to fire it accurately (my first range session with the gun saw my DA shots way off target). I expect dry firing will be good for getting to know the trigger as well as building strength for my grip and trigger finger.
I've been doing this in the living room, but despite being paranoid about safety and making sure not to have any live rounds in the same room with me, I think I'm going to move my dry fire operations to the basement where I can aim at a concrete wall and be sure no family members come walking by.
This thread also gave me the idea of taping up targets that match those I use at the range to help me acquire my front site faster (picking a random point on the fireplace mantle doesn't seem to work well for that).