@tubetime Oh, are we doing "things everyone should know but no one ever tells you"?
Here's mine: there are two different kinds of "cross head" screws: Philips and Pozidrive. Pozidrive has the little diagonals, in the screws and in the drivers. The sizes are (of course), ever so slightly different, and the drivers will fit MUCH better if you use the right kind.

There are more kinds, but these are the most common. https://en.wikipedia.org/wiki/List_of_screw_drives#Phillips