Plato, it is said, once rebuked a person for engaging in a gambling game. When the person protested that he had only played for a trifle, Plato replied, "The habit is not a trifle"
(Home Book of Quotations, Burton Stevenson (ed.) [New York: Dodd, Mead, 1956], p. 845).
It may not be out of place to say that every man (and [every] woman) is controlled by Habit. When Habits are young they are like lion cubs, easily managed, but later there comes a time when they manage you. Bad Habits may put you on the Avernus Jerkwater, No. 23, with a one way to Nowhere. Good Habits are mentors, guardian angels, and servants that regulate your sleep, your work, your thought.
[Selected Writings of Elbert Hubbard (New York: William H. Wise, 1922), vol. 2., p. 195]
So you'd better make good ones!