Seeker, there are so many paths out there that it should be easy for you if you had a sincere desire to find out about them doing a basic google search. Kundaini awakenings take place on all paths and traditions, because all kundalini needs to rise is a spiritual practice.
Here are how varied practices are in spirituality in history: fire sacrifices, mantras, mindfullness, idol worship, meditation, breath control, alchemy, contemplation, morality, charity, visualizations, pilgramage, music and dance, poetry, taking hallucinogens.
Any one of these practices can awaken your kundalini and give you spiritual experiences. If, however your question is what is the best practice to awaken the kundalini the fastest, then that is Kriya Yoga. In Kriya Yoga you work directly on the spine, your aim is to clear the nadis(nadi shodhana) in order to allow more prana to flow, and finally by gaining the control of prana to awaken the kundalini. You do practices like spinal breathing where you move your prana up and down the spine(this in a nutshell is kriya yoga) when you become more adept at the practice, you will be able to move the prana through each chakra. Another practice is meditating on each chakra by simply putting your awareness there and penetrating it deeply. There is a lot of energy work in Kriya Yoga. It is often called the fastest and lightening path of Yoga.
I am considering Kriya Yoga as my path, but I have a pull towards Raja Yoga. Raja Yoga is harder and slower, but the most simplest to do: observe. All you ever need to do if you want to reach the goal of Yoga is to simply sit, close your eyes observe your mind and keep observing it. Not reacting to any thoughts; just watching everything dispassionately. Keep this up and you will get to the goal. If you have real dedication, keep this up for hours or days. You will get somewhere. You will find though that the following will prove to be obstacles: your body will find it hard to sit still, your breath will become irregular and it will break your concentration, your senses will keep registering outside impressions, your mind will find it hard to remained focussed and keep identifying with the thoughts or think about the thoughts. This is why in the Raja yoga tradition there are several practices that are done to purify and train the mind-body so these disturbances are eradicated. Asanas, mudras and bandhas are done to train your body to sit still, pranayama is done to make your breath regular, rhymic and smoothe, antar mouna is done to train your mind to switch of from the senses, tratika is done to help focus your mind.
Theoretically you could just sit still, start watching your mind, and do this for days. You will initially be hit by every physical and mental challenge under the sun, extreme pain in the body, stiffness, hunger, thirst, physical restlessness. Drowsiness, bombardment by subconscious impressions, highly traumatic memories resurfacing, extreme cravings, even possible psychosis - but if you can remain in meditation despite all this, they will all gradually dissipate and eventually your sense of body will completely disappear and you will feel like pure light. Then your mind will become completely silent and you will feel immense bliss. Maintain it from hereon and you are not very far from enlightenment.

