The only reason why people do not have what they want is because they are thinking more about what they don't want than what they do want. Listen to your thoughts, and listen to the words you are saying. The law is absolute and there are no mistakes.
So, the fastest way to be more positive is to watch how you are feeling, rather than trying to monitor your thoughts and words. You are the only one who has control of your feelings, so start to get in touch with how you are feeling, and then deliberately
Gratitude is a powerful process for lifting your frequency and bringing more of what you want into your life. Be grateful for what you already have, which will shift you on to a higher frequency, and voila! You will attract much better things.
Quote by Rhonda Byrne: Your happiness depends upon your very own thoughts. No one else can think your thoughts for you. Deliberately think thoughts of what you want because they're the thoughts that make you happy.