awareness of writing always long texts

I was reading the last blogs by myself, and the following fact dramatically again came up:

I cannot write short texts! Never... :-(

I always start typing with the goal to write shorter texts, but it always ends up in a long text. Martin (our professor) always remembers me at homeworks, that if he gives us a homework to write a text with 150 words, that I shall write 150 words, and not 200... and every time I have to write the text (minimum) 2 times, until I have the 150 words!

So sorry for that, whoever reads my blogs -- posting short texts I have not accomplished yet! Except this one! ;-)