So what is important in the culture of the people/worlds you write about? How is history treated? Is it openly commemorated or is it hushed up? Have previous histories/cultures of the worlds you write about been suppressed and, if so, who by?
Is the culture on your worlds high brow, low brow or a mixture? In my fictional Fairy Kingdom some machines are used to save on magical energy (the ideas are often pinched directly from Earth and other worlds the magical realm keeps an eye on). What machines, past or present, exist in your world and do they contribute to the culture at all? Britain would be a totally different place without its invention of the railway system. So what does your world rely on here?
Does everyone appreciate the culture on the world you've set up? (In mine, the lower magical species have their own culture and it has very little in common with those more powerful than them. For pixies and imps, culture involves fighting and drinking. The Queen, fairies, wizards etc all look down on this).
How is culture and history brought to the people? Do broadcast media exist on your world and do they prepare programmes on this?
Hopefully there are some story ideas in there!