When we encounter art blocks, we can do one of two basic things: Take a break and pursue other hobbies for awhile, and see if your motivation comes back. Or force it until you draw so much shit that you get the motivation to do something good. The latter works for me much more that the former, but I know that taking a small break for a few days and listening to good music, reading books, watching movies, going out to different places, and spending time with friends etc. can fuel your creativity.
i once discovered upon experimentation, that contrary to what one would think, rules and structure actually act as catalysts to creativity. so I would say try making some rules about your art, maybe that might kick start you back into more activity.
when something is a game, it is funner. a game is defined by rules. so try making some rules about your creativity.
example: the "reality is a fandom" art game. 1. go to a public place. 2. take a photograph of a person in that place. 3. choose a fandom you like, and a character from that fandom 4. redraw a scene based on that photograph featuring your fandom and character. turn the person into the character from the fandom. turn all the scenery into matching scenery.
Maybe try sometime completely un art related. Try jogging (or watching people jog, because let's face it, running is HARD). Take a week long shower. Or just watch a REALLY good Tv show. Sometimes you just have to let it go and not worry about it so much. Eventually it will come back. Most of all though, I think it's important to still enjoy what you create, sometimes when you feel as if you're forcing it it becomes more like a chore, that you feel like you HAVE to keep creating something new, and that's just not good for you or your art.