Yea, keep your eyes closed like these people are saying, dont open them and you should transition smoothly into a dream without even having to visualize it. Make sure you don't try to move when you feel the SP effects, i've tried to move before to test if I really was in SP and it started becoming a natural reaction to it and I was never able to transition, you gotta stay still and eyes closed and just be patient. Like bredirish, I also had a transition where the vibratons stopped, everything went normal and I saw the back of my eyelids and I thought I failed, but then when I got up I realised I had actually successfully transitioned. Good Luck