From this AAR thread:
http://www.m4carbine.net/showthread.php?t=37773
And a comment posted on another website (I don't remember where at this point) about people who have to work 40+ hrs a week, spend time with the family, take care of the house, change the oil, etc not being able to get very good at shooting related skills.
I thought I would toss out some ideas on how to get good, what good is & why a lot of people don't get good.
The host of the class, we'll call him "Tom"

wanted to work on his reloads to improve speed & decrease fumbling about. As reported by Tom, Todd suggested 65 minute dry practce sessions of slow-medium-fast-slow progressions. It has been less than a month & Tom has reported his ability to reload has improved.
Tom's improvement helps show that you don't have to dedicate your life to shooting in order to get good. In class he did have some issues, but I would say he was pretty wel to the right side of the bell curve peak in terms of reloads.
If "Tom" feels like outing himself here I would like to hear from him on where he was post class & where he is now. If he has timer numbers that woud be great.
There is the misconception that you have to spend hours on top of hours on top of hours to get good & that is what holds a lot of people back. They don't want to give up time with the family, time to do work around the house, time to relax, etc. I would argue that you don't have to give up your life in order to have respectable shoting & manipulating ability. While you won't cut your draw, reload, malfunction clearing, split, etc times in half in a month by practicing 20 minutes, two times a week, you will see some impressive improvement. Especially if your times are not that great to start with. If they aren't all that great that is nothing to be ashamed of, we all start somewhere.
You don't have to be that dedicated to get a 2 second reload from concealment or a 1.75 second draw from concealment (both assuming closed-front cover garment). Likewise, .25s splits on an IDPA target -0 at 7 yards are attainable by people who are not "naturals" or "masters."
The easiest & cheapest way to improve yourself as an overall rifleman &/or pistolero is in the manipulations. In reference to Todd's class, you can't get an Expert rating in the FAST by having a 4 second reload, regardless of how fast you can shoot. Fast & robust manipulations buy you time that you can use for more important things.
A few guidelines for dry practice...
1- Weapon is clear, ammo stored in another room, safe backstop just in case
2- Get good, professional instruction, then get to work on your own
3- Treat this as serious workout time
4- Keep a log
5- Have a way to measure your par time & push yourself while maintaining the technique
6- Have goals & a plan for every practice session
7- Work one skill at a time
8- Accept that some days you will suck- find something else to do
I would really like to get some other perspectives & personal experiences regarding skill improvement on a mortal's time budget.