At each moment of every day, you choose your thoughts, words, and actions. You even choose your feelings by choosing your thoughts, words, and actions. So say, "Just choose wisely now."
The more frequently you choose wisely, the more this choice will become second nature. You probably know what happens to a person who keeps making wise choices of thoughts, feelings, words, and actions. They live their life much more wisely.
"But what if I don't always recognize the wisest choice?" Just saying, "Just choose wisely now," won't guarantee that you will always choose the wisest choices. But it will still be much better than saying, "Choose the stupidest choice!"
(from Rabbi Zelig Pliskin's book: "Conversations With Yourself", p.139) [Artscroll.com])