You could use power to pull stone from the earth, rend boulders from mountains, rip trees from the ground, snare animals in the air and blend it all together to create a huge castle, fully stocked with library (Books written by your own mind), furniture and larder.
This wouldn't be very fast, mind you, but the raw power + overwhelming skill would allow you to do this, conjuring it from the elements around you.
Other Gods might have to take more indirect routes, or pull things together piece by piece.
However, you'd also be barely more aware than a normal human (Thus more easily caught by surprise) and your presence would barely be more alarming than a powerful mage or magical creature.
That might seem advantageous, but if you're trying to get people to do something, it becomes more economic to have a way of verifying your identity that doesn't involve juggling mountains.
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather