Some triggers require more discipline than others.
For instance, shooting subguns gets one in the bad habit of immediately releasing the trigger once it has been pulled. This can cause bump fires with some triggers. To break this, practice holding the trigger back and concentrate on releasing it.
A good rapid fire cadence is to shoot, listen for the action to cycle, THEN fully release the trigger and begin your next pull. As opposed to a "bang-pull" cadence where you never fully release the trigger. Practice the former method enough and you can get to a proper trophy-trigger method.
When it comes to sloppy trigger control in rapid fire, I find 2-stage triggers are easier to manage than a light single stage. A 2 stage can be treated like a heavy single stage, but a light single stage can never be treated like anything other than a light single stage.
