This has been happening for a while. It might have to do with the excitement of my new toys (this blog, etsy, my sister's wii fit, ...)
I've got this hour to hour and a half sleep-less period at about 5 or 6am.
By now I have just accepted it: I read, think, or learn how to massage (I do adore being massaged. i would be massaged 24 hours a day).
I also feel terribly hungry, but don't want my metabolism to go "cookie time!" at these ungodly hours.
I read somewhere some time ago (or maybe I dreamt it, but not at 6 am) that native Americans used to consider this pattern normal and included it into their rutine. Probably the article said what they used it for, but my selective memory just took the "you are not the only one" message rather than the "how very interesting and informative" one.
I leave you with one of my favourite massage videos...