One thing about beliefs is that you simply cannot state a belief without knowing the opposite.
A well-known universal example would be I am stupid.
The opposite would be I am intelligent.

And you can change this belief very easily. Enter the resource level and say your new belief, see your self in this new role, feel your self as intelligent and use whatever senses that will come up for you. This is very easy to do and only takes a few seconds not hours.

The key is to do it on a constant basis for a few weeks daily. And according to some scientist it will take 21 days plus or minus a few to change this. Some other researchers suggest 30 days.

One fantastic method you can use to find these not so helpful beliefs would be the Over the Wall exercise in the Genius Code. The Genius Code is unparallel in finding answers. And you will be amazed at what treasures you will uncover.