Rethinking how you think about creativity
Your creative time as an artist isn't just the time you spend actively making something. Every waking minute (and possibly even some of your sleeping minutes) you are engaging with the world and whatever you encounter in it. Artists are always gathering inspiration even if they aren't aware of it. Similarly, writers are always writing, even when they aren't actually putting words together. The things you see affect you, and affect your art, though you might not be completely aware of those influences.
Think about taking a trip to a museum, or any place that inspires you (it's a zoo or a farm for me because I primarily draw creatures).