Elathron wrote:
The Dr's advice is to turn off all electronic equipment at least an hour before bed in order to let the mind begin the cycle of rest. Also, it's an idea not to use VDU's while in bed as it can disassociate your bed from the act of sleeping from a psychological point of view. At least that's what I can remember 
I have the opposite problem caused by playing handhelds at bedtime, now if I play handhelds in teh day I get very sleepy... Stupid brain associating handheld gaming with going to sleep. One thing that helps is playing games in Japanese as it is tiring for me to translate in my head while playing,so if you know a foreign language (less than fluently) it may help.