M - W - F - Su
I will do at least 30 draws from IWB holster with T-shirt covering it on each of those days. I do use snap caps, I'll decide right before the draw if I'm going to ready or straight to firing. I do this in the back room in my house that has four concrete walls with no windows. My "target" is a light switch.
I started this to see if it would have any noticeable difference on my draw times for IDPA. It did have a huge impact and my point of aim on the draw is getting more consistent. If I were not a weekend warrior I probably wouldn't practice that much, maybe a few times a month at the range. I wish I could find a method for one hand drawing from that same mode of concealment without getting hung up in my shirt a few times out of ten.
Once a month or two I'll take some snap caps to the range, mix them into mags with live rounds and practice tap rack bang and the procedures to clear double feeds (I can do it, just not type out all the stupid steps). I also make sure that I do my reloads exactly as I would clear malfunctions (bang the mag home, slingshot the slide vs. using mag release).
I also try to use a verbal warning on the draw, practice shooting from retention, and have focused on one handed shooting more than shooting supported.
Something else I do is dry fire 30-50 shots on two of those days. Instead of letting the trigger go I'll keep the trigger back, rack the slide enough to reset the gun, and focus on letting the trigger up only enough to reset. That's a very hard habit I'm trying to break. Working with an XD, 1911, M&P, and DA revolver makes that skill a very important one and the most difficult for me to remember.