It's possible to do this on your own by taking these basic neuro linguistic programming ideas and focusing them toward your own life. Remember a specific experience from your childhood or adolescence and explain it to a friend who wasn't present. What terms do you use, how do you describe it? Is it the space, the shapes, the details of color you see or do you hear bits of conversation or music or voices in your mind? Perhaps you just have a general idea of how it felt and what the textures were like, the temperature, etc. Pay attention to these words and terms because they are the basic elements of your mental computer.
If you're dealing with a specific obstacle or road-block, like fear of heights for instance, you can analyze how this fear or feeling looks, sounds, feels, or smells depending on the sensory modality that holds dominance for you and then reverse the anomoly. If you experience the fear in your gut, you might note that it feels like this fear energy is rotating clockwise in your abdomen. So you guide the mind toward feeling it pause and then reverse, to rotate the opposite direction. This is a signal directed at the subconscious saying to reverse the pattern of fear in the belly in response to heights. This is a simple example however the subconscious mind operates primarily on symbolism, in code. So you need to encode your desires and decode those problems bubbling up in order to communicate with you subconscious, depending on those sensory modalities you've identified for yourself.
Sequences of habit and behavioral pattern form over long periods of time or during dramatic or traumatic events so don't expect a simple once-over will do the trick for more serious debilitations. Some folks require work like this for extended intervals in order to rewrite the trauma or habitual patterns that have been ingrained in their psyche over years of habit. Be patient with the process and keep exploring the deeper levels and complexes of your psyche and you'll take this neuro linguistic programming to the next phase in your life.