There's an old saying which goes, "If you don't believe in yourself, who else will?" Making money involves transaction; exchange of goods and services that you have to offer. If you are not confident over what you are offering, then how other people would believe that what you are selling is of good to them? Remember that people always like to buy; they don't like to be sold. They will buy your stuff only when they see an air of confidence around you!
So if you really want to make lots of money, pump yourself with loads of confidence! If you see any of the wealthy people, for example Bill Gates, Stevie Jobs, Richard Branson etc, all of them have been always confident in what they have to offer. So people kept buying from them and eventually they were able to become super rich.
Now the question arises how to develop the 'Money confidence'? Well, the solution is using money affirmations. Daily practicing positive affirmations of attracting money will help you to build the confidence that you are attracting money. Accordingly your behavior pattern would gradually change and you will eventually be able to reflect confidence when you sell anything! Thus you will be able to make lots of money.