Although fun, sitting around the house and clicking away with your favorite firearm loaded with snap caps without a plan or focus is just a waste of time. You need to set up a drill. The great thing about this is after you buy a package of snap caps (at the most a $10 investment); this costs nothing but your spare time.
What I like to do is set up a focus point on the wall. While a target is nice, it can be something more domestic and less likely to garner eye rolls from visitors or your better half.
A painting or picture at roughly target height, even a light switch or thermostat will work. Just something to actually focus on is key. Note-- It is always a good idea to make sure, in the worst-case scenario, that you realize what is on the other side of the wall as well and take that into consideration.
Clear your weapon, check it for brass or ammo, check it again, then insert your snap cap or laser cap (they run about $75-$100 but will give you instant feedback on where you are aiming) and get to work.
Practice your draw from your holster, incorporating your stance, grip, draw, sight alignment and trigger control, focusing on that point on the wall every time. While you can do this in your boxers, it is generally best to go as "real world" as you can, wearing your typical street clothes if you are a defensive shooter or your range gear if you are a competitor.
Work on drawing and presenting with both hands, off hand only (it can be tricky!), strong hand only, working with mag changes while keeping your firearm pointed in the focused direction. You would be surprised how much ten minutes a day of focused training like this, in a safe environment and under controlled conditions, can increase your skill level.
Further, you will sometimes encounter those who have a problem with anticipating recoil. They will physically push the gun forward at the same moment the pull the trigger, like you did back in the day when you played with cap guns. You had better believe that this would spoil a shot. Odds are if you see rounds impacting on the top outside of the target, you may have a forced counter-recoil induced push or pull that is causing this. Controlled dry firing can help make this boogeyman a thing of the past.
Another way to think of this time spent is in the money you save. For instance, if you dry fire 50 aimed shots in ten minutes, that's a box of ammo you didn't have to buy, a trip to the range you didn't have to pay for, targets you didn't have to buy, a gun you don't have to clean and gas that didn't have to be burned.
If you figure that (modestly) at about $25 per range visit when you add it all up, you save something on the order of $175 a week while staying on top of your game.