Take a book or a magazine and count the number of words in a single paragraph

Count them again to ensure that you have counted correctly. You can start off with one paragraph and as you get used to it, move on to counting words in two paragraphs. Then move on to counting words on the whole page. Make sure that you perform the counting mentally and only with your eyes without pointing your finger at each word. This is one of the simplest brain exercises to improve concentration.