[Epiphany21]

That's one way to do it but it helps to think in terms of cursive, or people's sloppy handwriting where the letters are often connected by at least one stroke so that the tip of the pen doesn't need to be lifted from the paper.

There are also multiple ways to write a given character. For example, some people put a line through the number 7 for easier readability, and so it isn't confused with 1. Something similar can be done with 0 so it isn't mistaken for a 6 or capital O.

The real interesting characters are ones like number 4, where it can be square or triangular. However, to write the square version quickly you have to lift the pen. To write the triangular version you only need to put the pen to paper once.

These are just some common examples I see in use day to day. I'm sure there are many more optimizations being employed, especially in languages other than English where the characters can be much more complex.