Throughout some years working with game design, I have always found myself in the need to seek new sources of inspiration, whether for a personal or professional job. One of the best ways to increase your creativity is to collect images and references from other artists on a daily basis. Every year I create a reference folder on my computer, collect everything I like and that can inspire me in future projects. The first page of your browser must be a portal for artists' works, that is, there is no escape, daily I am bombarded with images and magnificent works, which only contribute to my creativity and perfectionism.
One of the websites I recommend is ArtStation and CGSociety, both are an excellent source of inspiration.
I believe that this is the minimum. Watching movies, being extremely curious, playing different types of games, drawing, writing a story, watching documentaries about the universe, mysteries, in short, all this contributes to having more and more references in our minds. Get inspired and use your creativity to create new projects.