I have two suggestions. One is to draw objects or scenes around you from life - from simple objects in your home to urban sketching or landscapes or whatnot. And I think part of this is learning to be curious about those things, learning from them while you draw and also learning about where your drawing is at. Also maybe, deciding whether to change something, whether to leave out details, whether to sketch quickly or slowly - all of this is part of your art experience and what art is 'for' (as much as it's for the resulting artwork). Drawing this way frees you from thinking you have to imagine everything in your head before you draw it. The other suggestion is kind of in the opposite direction - I've started sometimes doing meditative drawing. If you have any kind of meditation practice, it's pretty simple: keep a sketchbook at hand while you meditate, and when an image comes to your mind, quickly sketch it, then go back to meditation. Don't worry about producing a great drawing - it's just about opening up to your subconscious store of ideas. There are no rules about what you draw. If you get some good things from this you can always develop them into more composed drawings later.

I personally get inspired when I read books. Forces my imagination to kick into gear and try to visualize the words on the page.

Hey Christopher. First off, there's no shame in using prompts if that gives you incentive to draw. Drawing is drawing, it doesn't matter how you go about it as long as you're having fun. As for your question, let me ask you something in return: what is it that gets you excited about art? What is something you're curious about trying/learning? What makes you go "I want to do that!" when you see another's artwork? What inspired you to pick up art in the beginning?