Sleep early, wake up even earlier!

Have had this experience before... i slept at 10pm last night due to tireness, and now... i woke up at 3.30am and i cant seem to get back to sleep... Tried reading a couple of comic books, cant get to sleep, toss around in the bed also cant get to sleep... It was abit too hot on bed and i was strucked by a terrible cold again! Finally until 5+, my mum woke up and gave me some medicine, I STILL CANT GET TO SLEEP! Oh well, then she asked me to go on an errand later when the shop opens, darn... 6.07am right now... what should i do? It has become even more boring as each day goes by...