A series of steps are gone through when one wishes to expand a current reality tunnel:

1) An alternate view upon reality is experienced.  One now realizes that there are options, that option A isn't all there has to be.  Option B can be made to supplant, or coexist alongside, option A.

2) One goes through the steps of finding out how option B came to be, taking note of what made this experience part of their reality, even if only for that moment.

3) Once these steps for an alternate reality are defined, thoughts and actions are organized so option B is given priority over option A.  The original experience is constantly being reproduced in many forms so that it may have a lasting effect.

4) Given time, deep thought, and repetition, option B, or both options A and B, will become part of the envelope around one's infinite universe.

There are times when the original experience is so powerful that no repetition is needed.  These intense, often mystical, happenings transform one's reality in one intense explosion of infinite awareness.

Now, take a deep breath and be prepared, because option C fast approaches.