Same problem here. When I WBTB i try to keep saying stuff in my mind to induce a Lucid Dream but if I keep concentrating I can't sleep and if I don't concentrate I go to sleep. Its a tough bind, so I looked for other WBTB techniques that are easier. I am going to try HILD for a month or so. Its in the tutorial. Basically you wake up and when your boing back to sleep and are really really tired ... im too lazy ... just look in the tutorial. I tried it last night but it didn't work.