One of the most powerful tools for transcending the illusion is the knowledge of how it works. First, understand that there is a much larger Reality than the teeny tiny world that most human beings are living in. I usually call the larger reality God, but that's a loaded term that people have many different conflicting beliefs about, so I'll stick with the term Reality.
Now, the illusion isn't a direct part of Reality, but it does directly affect how peope perceive Reality. Because it affects perception, it can appear to be the reality, and a person stuck deep within illusion cannot tell the difference. A person going through a spiritual awakening has, however, gotten at least a brief glimpse of the Reality beyond the illusion. This usually leads a person to question everything in their life, and realize that the way things Really Are is not what they used to believe.
Another very important thing to understand about the illusion is that it's made up of what you believe. The illusion is nothing more than the beliefs held by the limited mind. Reality simply Is, and its Truth can be observed directly without any need for interpretation. The mind makes things needlessly complicated, and forms beliefs based upon limited perception. This has a bit of a snowball effect, since beliefs are what influences the mind's perception, and then that limited perception is used to form more illusionary beliefs. You can't build up truth on a foundation of lies, but this is what society attempts to do every day. This is how people get so lost.