Old habits are strong and jealous.

To guarantee success, act as if it were impossible to fail.

By going over your day in imagination before you begin it, you can begin acting successfully at any moment.

Now this is very important and can hardly be emphasized too strongly: You have decided to write at four o’clock, and at four o’clock write you must!

If you are writing a manuscript so long that the prospect of not reading at all until you have finished is too intolerable, be sure to choose books which are as unlike your own book as possible: read technical books, history, or, best of all, books in other languages.