Most of the time I just draw this girl:
and things happen, but my professor (the incredibly awesome John Hendrix) this semester had us compile a list of "100 Things That You Love to Draw." I’ve got things like pigeons, chickens, fat dragons, people in crewneck sweaters, Tifa, ocean waves, hightop sneakers, Tifa, bears, skirts, narwhals, sunny-side up eggs, and rice bowls on my list. It can be anything you like, and it doesn’t even have to be 100! Having that list is really handy because you definitely know that you like to draw certain things, but it’s even more satisfying when it’s concrete in a list.
Observational Drawings are also helpful. When I have art blocks sometimes I just it in my room and draw things.
Life Comics — there’s always something happening, and there’s always a way for you to make it interesting! Sometimes i’ll draw myself very angry and upset and stressed out b/c I can’t think of things.
Fanart — well. pretty self explanatory. But it also extends to drawing your friends’ characters too!
Reference Images —you’ve probably saved a lot of images from the internet over time. Flip through them and just see which compositions, colors, lineart style or whatever strike you and go for it!
Copying — trace some stills from movies you like, or concept art. It’s really just a way to get your drawing hand going, but copying is also helpful for studies! (obviously don’t post them as your work haha)
BUT MOST OF ALL, JUST DRAW!! Sometimes you’ve got to draw through your blocks and shake out the terrible drawings in order to get to the good ones. Draw on sticky notes or copy paper or in dirt! Doodle on your notes, on your friend’s essays, on your leg. You’ll find parts of your drawings that you’ll enjoy and can inform your work. :)