the swallowing problem is a huge dilemma for me as well..it affects about 50% of my attempts and i have found that a glass of water 5 minutes before going to bed with another glass of water on ur bedside table or whatever is a big help......
also the position your head is tilted at affects it as well...to hgh up and the problem becomes worse...so sometimes i use 1 pillow or just lie further down, maybe you might want to try any of those ideas....it helped me maybe it might help you

with the closing your eyes thing its best to get rid of the light,,,i also have the same problem with the not knowing if you can see through ur eyes or if its ur eyes open..because i always open them and see my modem/router lights blinking.......the best method for this ive found is to concentrate on lucid dreaming or to lower your concentration and relax more.....like other members have said ^

good luk on your attempts anyway mate
catchya