Insomnia

I have crazy insomnia!!

Its not rare for me to catch a little insomnia from time to time, but I know this time its due to all that's going on in my head! I close my eyes and then things like: I have to clean xyz. Oh don't forget you need to pack xyz. Did you do xyz. Are you going to get it all done Monica? Oh and I have to do xyz before the weekend.Do you have enough money for xyz? Are you going to be able to pay for everything?... its driving me crazy!

How do I turn off my head so that my body can get quality rest (in a healthy manner)??