If you are aware of the negative beliefs you hold, they are already in your conscious mind.  From there, you can easily let them go through such practices as setting the intention and meditation.  However, there may be some negative beliefs that remain in your unconscious and subconscious mind which you may not know exist.  Fortunately, with help, they can be brought into your awareness.

We carry beliefs from both past and present lives.  We can either be given these beliefs by people we trusted or developed them ourselves in response to certain experiences.  For instance, one may believe it's a struggle to make money based on their parents' struggle.  They may also believe that love hurts based on their experiences with love relationships.  These beliefs can run fairly deep and will stop us in our tracks if we don't clear them.

Clearing beliefs takes time.  Each time we take a step forward towards fulfillment, we must examine our belief system.  What are some of the beliefs you know of that are counter-productive to your success?  Write them down, then release them by setting the intention and allow and accept new beliefs that are in alignment with your heart's desire.  Also, I highly recommend you seek help and support to uncover any hidden beliefs in your unconscious and subconscious mind.  Ask for help in releasing and aligning them as well.

I have found that clearing beliefs is essential to our fulfillment, joy, and well-being. Just for today, take a look at one of your experiences and try to notice what beliefs you hold that have created it.  If you can't come up with an answer, don't worry as help is always available from counselors, healers, and of course the Divine.  Otherwise, meditate on it.  Allow the answers to slowly and gradually come up into your awareness.  It takes practice to do this but I assure you it is well worth the effort.  Your life can dramatically change for the better!