The mere fact of existing gives you dust.
Existence and experience games will give you dust (as you can see in your character menu “time alive”, “Angel dust”, “Dust gained”, and “Traits”)
The more dust you gain the more trait slots open up.
If you log outside of a bed your character lingers for a fat minute until vanishing from existence.
If your body doesn’t linger in the game, your dust gain is halted until you relog.