Another sleepless night

This is so crazy to me.  I can't believe how tired I am and yet I still can't seem to sleep.  My thinking is that I can't turn my brain off enough to relax and thus fall asleep.  I am always reviewing German in my head, how to ask or say things, what certain words mean, etc.  The other thing that won't leave my brain is how I am going to file my taxes this year since I am not in the USA.  I have tried looking into what my options are but to no avail so far.  Hey, at least my sleepless nights aren't wasted :)