There's a practice called Deity Yoga. I'm gonna introduce it in a course soon.
Generally I work with Bodhisattvas rather than gods. A Bodhisattva remains in the universe to serve the liberation of all beings.
Gods are slightly lower on the ladder and they will often ask for things in return for their help.
Bodhisattvas ask for nothing.
This distinction is important for those who want to practice Deity Yoga.