I think it may be best, rather than trying to stim your way out of this urge, to confront it for the flight of irrationality it is. I have to think that, if you are to take yourself seriously as an atheist, being able to contemplate the sheer silliness of praying to some imaginary being should be a part of your intellectual capability. Write yourself a list of reasons you want to pray, and then respond to them with the rational side of your brain. After a fashion, this is like building muscle: You have to tear it down for it to rebuild. Tear down your theist fripperies, and build up your atheist sensibilities.
Trying to update my sig ...
