Well, to me the easiest way is to try to relax and think about your surroundings. Playing a Video Game while you're tired will work as well, and TV, too!

I used to have to enter SP, and WILD in order to fall asleep, and it wasn't very pleasant staying up until 1AM, getting up multiple times during the night, whether with an upset belly, or stuck in SP (even though I was only 3, it never frightened me at all...I just knew I was going to fall asleep), and I always knew I was dreaming even then.

Now, with SP, I can choose between 2 methods: WILD, and ...?.