“I want to know about different Kundalini Awakening or Kundalini Raising Ways or Systems or Techniques?”
I will not specify the precise techniques, as if you are really interested in the matter you will research it out of your own effort and energy. There are various mudras, bandhas, kriyas, and visualization techniques which are used as methods to awaken Kundalini.
“Which meditation is best for raising Kundalini?”
There is no such thing as best, only relative skillful means. If one is using concentration as the means, then it ordinarily involves a combination of mantra and yantra together while fixing the mind on a chakra center in the body. To come to know of which mantras and yantras to use for this purpose, you should try and obtain a knowledge of the correspondences for each chakra center. Each have particular properties - colors, geometrical forms, mantras, and yantras. Besides this, it would also be useful to obtain a knowledge where the fundamentla nadis of the subtle body are located, as there are a number of techniques which focus upon visualization of these nadis.
“How do some people accidently awaken their Kundalini?”
In the same way that people get into a car accident.
“What I think is we have to make conscious long term efforts for it,no?”
It is the case for more than ninety five percent of those very few who even consider the expansion of consciousness through such methods.
“Can some Binural beats aid in Kundalini raising?”
No, that is not their function.
“Is their any fast way to experience Kundalini?”
There are, but you should not even consider trying them as there are even greater risks involved than the more common methods.
“Has SUNGAZING anything to do with Pineal Gland?”
Yes. Any method which stimulates the neo-cortex of the brain can activate the pineal gland, including other methods of gazing such as tratak or shambhavi mudra. The difference with the method of gazing into the sun is that one is absorbing prana directly from the sunlight, although one should not attempt this except at particular times of the day when the light of the sun is not so penetrating as improper practice can cause permanent damage to the retina.