Periods were an extraordinary invention. It took thousands of years of writing before we settled on this simple convention.
The most direct way to improve your writing is to make your sentences shorter.
I was reading a magazine article yesterday and was rapidly losing interest. The topic appealed to me, but I couldn’t keep reading. Then I noticed that halfway through the first column, I was still on the same sentence.
We have trouble keeping that long a string in our heads at once.
You can make sentences too long.
But it’s hard to make them too short.