Affirmations are phrases you tell yourself or other people. An example of an affirmation, one that Tony Robbins loves by the way, is
Day by day, in every way, I am getting better and better.Tony Robbins
This may sound picturesque and old fashioned, which is hardly surprising, as it comes from Dr.Émile Coué. He directed a clinic in France in the beginning of the 20th century. His main technique to treat thousands of patients was to repeat this affirmation 20 times, twice a day. Although he claims he never actually cured anyone, and they cured themselves, these cures certainly did happen. You can get his SELF MASTERY through conscious autosuggestion (Illustrated) to read on your Kindle.
The starting point in personal development is you. Simple as it may sound, the only thing holding you back is you. Take a look at your beliefs; are they empowering you, or are they limiting you?
We develop our beliefs through experience in life and develop an inner talk that reenforces these beliefs. We can change our beliefs; one of the ways to use improve your internal dialogue with positive self talk. Take a look at the flood of positive affirmation quotes enticing you develop your positive beliefs used in in twitter for example.