Read Franz Bardon. Here in Brazil it came by the name of "O caminho para tornar-se um verdadeiro adepto".
Serch for the original name and how it was translated to english:
Der Wed Zum Wahren Adepten.
It have a lot about what you are looking for.
WEll chanting "Aum" mentally before sleeping can open it AND will give you a very bad headache too
Flashes of light... you wont be able to sleep... really weird, small, stupidly positive and lucid dreams are all part of package
I'm so weird I can open my third eye but I dont want to as I am really scared of those flashes and I really love sleeping at 11... when I tried opening 3rd eye I was damn excited and then I felt like I cant stand all this stuff so I never ever chant "Aum" :)