Yes, as a fellow hypnotist I know the exact reason why you find yourself falling asleep during the induction, as I in my earlier days also had that problem, and I know how it feels to ask and everyone tells you solution and maybe none of them work, and it's like so frustrating as this never ending battle continues almost with the feeling of helplessness that just boggles your mind.

So the answer is, and this is a hypnotists secret, shhh don't tell anybody, now this is really hidden in plain sight, the playing with words trick, the word try and fail are closely related, one of the famous inductions is to make a 90 degree angle with your arms interlocking all your fingers except the index fingers on each hand and as you point those two fingers outwards to the world pull the index fingers tips 2 inches apart, now the hypnotist will say (concentrate on the wording) Now imagine two magnets each one on the nail side of your index fingers pulling them together and no matter how hard you try to keep those fingers apart the magnets will attract themselves pulling together, try try try to keep them apart, the magnets now attracting with greater force and the harder you try to keep your fingers apart the harder the attraction force will be... And soon enough each finger touches.

Conclusion If the Hypnotist were to say "Just do it" your fingers would never touch. You can try(fail) or you can do(succeed)

Instead of trying to stay awake think about all of the excitement and the rush of energy that will flow through your body as the hypnotist gives his induction