you dont have to go on the computer. People just do that to pass the time, And i think the light from the computer screen wakes you up a little. You dont have to stay up for 30 min. either. You just need to stay up till you feel pretty wake and not so groggy. This could be two min, or 45 min. It doesnt have to be 30 min.

Its STRONGLY reccomended that you NOT WILD before you go to sleep.

Iv'e heard that if u wake up in the night, then move your index finger for a while and u will slip into lucidity?, can someone please give me a little help here. thanks!
that is called a FILD You do FILD when you wake up randomly through the night. When you wake up, dont move. Just almost wiggle your index finger and middle finger back and forth. Just almost move them, dont really do it. I havent ever succefully done a FILD though, so if you want more help you got to talk to someone else.