What about locations or organizations? Do your characters frequent a cafe? Describe it. What do they serve? How are their prices? Who are their typical clients? What is the atmosphere and ambience like? What are the employees like? What do your characters get when they go--the same thing each time or something different and what do they get? What is the food like?

Maybe your characters live in a fictional town or work in a fictional company or go to a fictional school. Even if this is real, describe it. Google it for details so you don't have to look them up later. How many students go to school there? What's their racial makeup? What programs is the school known for? What famous people attended and/or graduated from there? What are you characters studying? What classes are they taking and how are they doing in them? What campus activities are popular? What is the campus atmosphere like?

There's plenty you can do.