Screw Holder

Not tried that one... but generally something magnetic with a sleeve that is free to rotate is normally fairly easy to use. You can hold the sleeve to steady it, and then drive. The main key is to find a screw / bit combination that really engages well - and then it pretty much stays there without much help.

Hard material? Use a bradawl to make a start hole.

Agreed, having things wobble about is sure sign that the bit in use is a bin job and time to use a new one. Other than that practice and holding the screw just to start. I also find that "gun" type drivers are far less controlable than a straight driver both from the wibbly wobbly aspect and torque/speed control. I'll be lost if the trusty B&D 9019 driver ever dies:

Loads of torque, steady speed, variable clutch, spindle lock.

These work OK

These are excellent, but pricy

Well, in the main wood, but at awkward angles. Bradawl would certainly help, agreed.

Yes, the turbogold screws are pretty grippy most of the time.

My tool of choice - a load of flooring, struts/braces, plasterboard - is an impact driver. I also have a 14V cordless drill, but that lacks torque, but good for pilot holes and light work.

Looks good and worth a try, thanks.