i wouldn't call myself the most creative person on the planet, but i definitely have quite a collection of ideas in my head so i hope i can help you out! these tips are more for coming up with concepts rather than the actual execution though.
i personally think its very important to surround yourself with a lot of different forms of art. follow other artists on social media, both artists who makes art similar to you (or similar to what you want to create) and artists who make completely different art from yours, that way you might pick stuff up from them and you (hopefully) won't get stuck in an endless cycle of just seeing art similar to yours, so you won't get any new ideas.
video games and movies are also great for inspiration, some of my personal favourites for inspiration are stardew valley, overwatch and the movie annihilation, among many others.
i love telling stories through my art, so i read a lot; poetry, short stories, novels, even things like tumblr posts and tweets help inspire me. same thing with music, i like writing down lyrics that catch my attention to refer back to for inspiration.
basically, i think it's a good thing to not only search for inspiration when you want to draw, but to "force" yourself to subconsciously look for it in everyday life by surrounding yourself with it. by seeing what other people are making. and, when you get ideas, no matter the time, write them down and save them for later! no matter how vague the idea is, even if it's just a song lyric, a colour, or a specific feeling, write it down and refer back to it when you want to draw.
