Sit down with your eyes closed in a quiet room with no disturbances for at least 10 minutes. Let your thoughts come and go without any conscious intervention. When you catch yourself intervening, just remind yourself that you are meditating and you don't need to be concerned with anything right now. When you start wondering if you're doing it right, remember that's just another thing you don't need to be concerned with. The same goes for everything else you are thinking about, you don't need to care about any of it when you're meditating.
Do this until you get too frustrated or tired to continue and lay down for a few minutes or longer. Laying down is to both ease the transition back into outward living and give the body extra rest that it may desire after meditating. Doing this long enough and frequent enough will allow you to break through into a 4th state of consciousness.
That's it, that's the whole technique, there isn't any other requirement to make it work. We are not focusing on what happens once you get to the 4th state of consciousness, only on the easiest way to get there. The complicated and varied methods of meditation can be explored once you are able to break through into the 4th state, so don’t worry about any of that while doing meditation.
However, there is the unfortunate reality that just because it is basic doesn't mean it's easy. Not being concerned with anything is very difficult in a world where forceful thoughts is what gets you everywhere and everything, but that may in fact be why we need to meditate so badly! The mind needs to bend both ways, otherwise it gets very sick. We start to lose energy, ability, and the common sense to perceive what's important.