Meditation is quite simply medicine for the soul. It allows us to peel away the layers of the Onion such that our Soul can bring forth its message in a more congruent way (unmodified). For many, Meditation presents physical and mental challenges which can be very discouraging when we jare ust getting started. So, from the perspectives here, there is only one rule for Meditation, just do it! Sounds too simple? Meditation is a Practice and that means it needs Practicing, so lets get started.
Meditation requires that we make time, this is a given and we must be disciplined about this part. Next, we need some space so that we can stand, sit or lay down (hanging upside down from a tree would probably also work). But seriously, it doesn't matter how you are positioned as long as your reasonably comfortable. Being comfortable is not the key but you have to remember that your going to be in this positions for some time and being too comfortable may result in falling asleep, being too uncomfortable might give your Ego too much to complain about and put you off Practicing. The Half Lotus position can be seen in the website logo and above, it is possible the most comfortable position for long periods of Practice. The lower leg is turned down so that the toes and bridge of the foot are flat on the floor and there are no sticky-out boney parts in contact with the floor. The upper leg is also turn down in the same way but it is resting on the other legs calf muscle. There are of course variations on this but should provide a good foundation. A pillow or cushion is a good idea to sit on, it will help you keep your back straight and actually compliment the Half Lotus position. Sitting on a hard floor can be a little challenging so you might want to use a Yoga mat or towel. Our backs should be straight but also relaxed and our shoulders should also be relaxed. Our heads should be facing almost straight ahead but perhaps with a very slight tilt downwards. Eyes can be opend or closed, when open perhaps look at a point on the floor at a 45 degree angle. Breathing through your nose is one of the best ways to remain focused.
Meditation can be Practiced with sound, music, voice, guided or unguided. There are lots of materials available to assist with your Practice, use whatever works for you.