I dry practice 3 - 4 times a week and Live fire about 2. I use Mike Seeklander's Session A and B from his book. 10 repetitions of each drill, and have made audio tapes with timers built in with par times. It is a set 15 or 20 minute session, which includes both, basic draws, reloads and transitions, most of which include moving while doing these drills. I find, the best way to increase your overall time is not to shoot faster, but to draw, reload move and transition faster. I use live fire to practice double taps versus controlled pairs at multiple targets, varying distances and partials, or to set up a stage and break it down by those components.
When I live fire, even if it's practicing a classifier like El Pres, I write down each time, draw, dbl tap, transition, reload. This is for a record of future progress, but also to slow me down and not just blast rounds, as it allows me to analyze each run. I then set a goal for the next, whether it is working on speed or accuracy. That's what I try to do.