I just saw this video from Tony Robbins interviewing two people, Frank Kern and John Reese, about what makes some people successful and puts them past that "sticking point." For example, they talk about some people who take a step towards a better life and then BAM! it's like they hit a brick wall. This happens to so many people!
What Tony says contributes to this is a persons belief in their potential and the certainty they feel about their actions. Definitely watch this video if you're interested or you feel like maybe you have been caught in a sticking point.