That's a tough question. I mean like modern life, being a god-king has its ups and downs as well. But given the fact that I get to keep my 21st century knowledge I'll give it a go.
While I don't consider myself a political animal I guess I have a few tricks up my sleeve. If old grumpy Yah gives me a headache I'm going to up the ante (up the ankh?) and go all postmodern on him and tell him he's basically a social construct by a politically and militarily inferior but perhaps intellectually superior minor city-state beyond the edge of civilisation. Maybe I should learn how to play "Eruption" on a Sitar before I go so I can impress Babylonian diplomats? Or would "Misirlou" be the better choice?
Thinking about it, polytheism has its advantages, and the ancient Egyptian variant can be both hilarious and very flexible. If a god-king is feeling a little blue after an altercation during the legislative assembly, his daughter might drop by and show him her private parts for laughs. Pretty much every god can take the shape of and function like another which makes resource management so much easier than having to deal with today's highly specialised workforce in, say, telco.
When my Ka (lifeforce) is leaving my body, probably at an early age, I will glance at my 18 foot statue in my bedroom of Isis nursing the doomed Horus, shed a tear, and say fuck it, I did what I had to do, my tomb will stand until the end of the world, and my afterlife will be so much more glorious than anything anyone from all these wannabe, second-rate, low-tier empires can even imagine.
This was just the beginning.