Include positive words in your affirmations that entice you to feel how you want to feel once your affirmation has manifested. For example, rather than saying, "I am wealthy." change it to "I have the freedom of financial independence." By adding 'freedom' the affirmation focuses on how you want to feel when you have manifested wealth instead of just wealth.
Smile, stand up straight, throw out your arms and loudly proclaim your affirmation to be true. Including your physical body in your affirmation can do wonders for keying up your emotions.
Repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat. The mind molds to the thoughts that are thought most frequently. To change reactions, habits and life affirmations have to be repeated consistently. Start with 5x in a row 3x per day. Every day, no exceptions.