ive had problems before with this, but after finding a master of this on the internet (guys a freakin pro, over 5000 lucid dreams and counting) who was willing to share information, hes come up with several ways of getting past all of those blocks.
1: keeping your muscles from tensing too much.
muscle tensing is normal during the period of time when you switch from the wake-asleep threshhold, since your going from awake directly into a sleeping state, your muscles tend to spazz out occasionally.
ways to fix this:
1: purple stuff.
purple stuff is a drink that is not sold in most stores, but you caqn buy it online in jugs, its used as a cure for hyperness, or even people with minor turrets use it to stop certain actions they do unintentionally.
this can also be used to calm yourself to stop muscle tensing during WSP.
2: stretch.
before you go to sleep, you can stretch to relax your muscles, i find this works better than the purple stuff, mainly becouse if you count on purple stuff too much, when you dont have it, you might not be able to even have a lucid dream becouse you cant relax.
these stretches dont have to be that complicated, just something that helps you relax.
now, ive heard people talking alot about having problems with swallowing, the thing is, it actually triggers muscles that trick your body into staying awake. (WSP is actually a way to convince your body that your mind has fallen asleep, in turn making it fall asleep, if you move your muscles, the body will wake up.)
ways to fix this:
simply dont think about it.
if you think about swallowing, you’ll do it.
its as simple as that.
this may take some getting used to, becouse if you think about not thinking about it, you’ll think about it making you do it.
gets pretty complicated if you think too deeply into it.
now, these vibrations are commonly misinterpreted as “normal” when lucid dreaming
heres the thing, what your doing is not just lucid dreaming.
people dont talk about this alot, becouse this vibration process is actually only related to WILD’s and O.B.E.'s, and personally i think O.B.E.'s are alot cooler, becouse they put you in a lot more focused state, and their even more vivid than lucid dreams.
this vibration process is a reaction that occurs when your “astral” body seperates from your physical form, wich pretty much means your getting into an O.B.E.
the MOST IMPORTANT thing you can do during this, is RELAX.
these vibrations, especially during the first time, will get stronger, and stronger, until your entire spine goes rigid.
not only will you feel intense vibrations, but after a little while you’ll start to hear buzzing noises, like your being attacked by bees.
this might even scare you a bit, becouse you cant move during this entire period of time, but once you reach this stage, your almost there.
now, even i have this little eye movement problem.
during lucid dreams, your eyes wont remain closed, unless you FORGET about them.
before you go to sleep, just to help this problem, close your eyes, and roll them around in wide circles, start rolling them clockwise 5 times, and then counter-clockwise 5 times, in wide circles, as far as they can go, but not enough to hurt.
this will keep your eyes shut, but this is only a temporary fix.
what you need to do is escape from your eyes.
remain imagining, dont focus on whats behind your eyes, focus on whats in your mind, what your imagining.
after a while of this, you will completely forget about your eyes.
therefore, they wont open unless you actually try to open them.
after this, keep going with your normal routine, and once you start feeling the vibrations, and keep relaxing, after a few minutes everything will stop.
no vibrations.
no buzzing.
after this, your lucid.
but you have to make sure!
you cant simply get up, becouse if your not actually lucid, youll have to start all over again.
this process is actually alot simpler, all you have to do is imagine yourself falling through your bed, like something really heavy is on top of you.
if you feel yourself falling down, this is good.
then, just to be sure, imagine yourself rotating clockwise.
like someones turning you around like a wheel.
if you feel yourself going to the left, then your good!
your in your dream.
if you open your eyes and see your bedroom, this is normal.
from a transition for your physical bedroom, your body doesnt recognize ever falling asleep, therefore, your still in your bedrrom.
just in a dream at the same time 
well, that was a long post, but im still not done.
there is a slight chance of this happening once you wake up from lala-land, you might not actually be able to move.
at all.
not even scream.
this is a rare occurence, but its not permanent.
but your still in a semi-dream state.
your dreams will flow into your sight, but only FEAR will escape the confines of your mind.
let me explain a bit more, if this rare occurence is to happen, you will wake up.
you will try to move.
but you cant.
you try harder, your body fights you even more.
all of a sudden, a black shadow starts to flow from your door.
the most frightening thing you have ever seen will come out from the door, and most likely walk slowly torwards you with either a weapon, or maybe it has claws, and wants to rip your face off, either way, its going to scare the living **** out of you.
after a minute or two, your body will give way, and you will jump up, and the vision will be gone, these things are your own personal demons, everyone has thier own special ones sleeping within the confines of thier mind, but dont worry, they cant actually kill you.
anyways, good luck, and sorry for the long freaking post, had alot to explain.
and feel free to ask any questions you have, there’s no such thing as a noob 
everyone starts at the beginning, right? 
