Dry firing is the perfect practice because you will know if you do anything wrong as the sights will move. Life fire may just ingrain bad habits unless every shot you fire is perfect.
I really don't think anyone can really concentrate on dry firing for more than 10 minutes. I mean that you concentrate on the front sight, feel the trigger, take up the slack, press straight back feeling the pressure on your finger until the hammer falls, still concentrate on the front sight, come to low ready and reset the slide or hammer and do it again. This is done slowly and all your concious thinking is directed to doing this perfectly. If done correctly you will be mentally tired.
What you can do is while watching TV is do magazine exchanges over and over with out looking at the gun. You can also press the trigger while watching the TV to feel the trigger move through its arc without looking at the sights. You are trying to feel exactly what the trigger feels like as it is moving acrss the sear or disconnector.
Since most actions start with the draw I would suggest you draw, align the sights on a very small object on the wall and press the trigger without moving the sights. Make sure your first shot is perfect and you have the proper grip and stance.
To ingrain an action you should operate at 75% speed and make sure EVERYTHING is done correctly. Remember practice just makes permament but PERFECT practice make perfect!
I can suggest that every morning after you strap on your gun you say to yorself that today may be the day you will need this tool to save your life then do 5 slow perfect draws and let the hammer fall. One thing to try to do is make your draw so good that when your pistol stops the sights are perfectly aligned with the targert so that you don't waste time to make an adjustment.
Then once your practice is over make sure you say this to yourself, "I'm finished, not one more time". Most every ND I have know about was from someone, after loading their pistol, said "one more time". Do I need to remind anyone to unload their weapons and move the ammo to another place.
If you did this for a month or two your shooting would improve greatly.