I've read with great interest the topics in this forum.Some very good advice has been given to newcomers to help them in their problems.It could have missed my eyes but I did not see any advice given on the position of the tongue which is also very important in meditation.It should be curled backwards to touch the roof of the mouth so that there is a complete connection.The upper set of teeth should also not touch the lower set of teeth.I practice in this way. Thoughts, views and comments please.
I was taught, and all sources I know of, do not refer to "curled backwards", but that the tongue is up against the upper palate (roof of the mouth), with the tongue-tip just behind the top front teeth. Part of the reason is that the energy channel it connects runs down through the nose to the top jaw at the front. (Which is in front of the middle of the palate, which would be where the tongue touches if it is "curled back".)