Both Stephen LaBerge and the guy who wrote Lucidology recommends to WBTB for 6 hours, then stay up for 45 minutes and then go back to sleep.
And even if it's harder to fall back to sleep, it's a much higher chance to get lucid dreams.
But.. What to do on those 45 minutes?

What do you guys do ? I used to stay up only for a few minutes, but the Lucidology recommends 45 minutes to 1 hour. I thought of sitting at the computer, but apparently the lights are bad for my inner sleeping clock.

Thanks.