Know what you want. You would be very surprised to find out that many people don't know what they want out of life. Many people are either still searching or let things like fear stop them from success of their dreams. So first thing is to clearly get in touch with what it is you want in life.
Write it out in the present tense. This is important. What you want you must now write in the present tense as though you already have it. An example will be "I am now very prosperous and money flows to me easily to me now." This may seem like a lie at first to you, but when you start writing your affirmations this way, you will be amazed at the results.
Daily habit. Make this a daily habit, of reading your written affirmations each day for at least 30 days. This 30 day affirmation will be a good tool for you to get in the habit of doing affirmations. Remember the challenge really isn't in saying the affirmations daily. But in emotionalizing the affirmation. In other words, as you read the affirmation you must feel it with your entire mind and body as if it were really taking place right now. Use all your senses for the very brief amount of time as you read your affirmation for real results and manifestation.