I go through this stuff monthly, so I'll just give you some things that have happened to me in the past and I hope they help you out as well.
Not everything negative is good, but in order to have some sort of motivation some kind of event has to impact your life. Back a few years ago while I was in high school my first girlfriend broke up with me. I did some self searching and realized that I could have been a better boyfriend (less selfish and stuff like that) but after I went on this self discovery I found that she also was cheating on me. Some weeks later, I had an assignment to write a short story for my Creative Writing class. The 3-5 pages turned out to be 13 pages long about that journey I took and how even though it was for the best would never change the past. Teacher loved it so much, she sent it in to get published. (Just typing this small paragraph here made me want to pull out the original copy and go through it again).
This may not be parental approved, but; I love H P Lovecraft. His macabre take on occult esoteric magic of summon gods from an other plane of existence inspired me to do more writing. However, I needed some help. The few small stories I have done were actually just in one sitting, listening to ambient music with no lyrics and have a few glasses of wine. My words, coherent. Writing, legible. But the more I drank, the more my mind twisted the reality of fiction I wrote and it became a different story altogether.
Just recently, and what had brought me to chiptunes, I became sad that there were no more games that grabbed my attention like the classic Final Fantasy (FF VI to be exact). So I began to write, and when I wrote something down, something else came to mind. This kept happening so quickly that I bullet pointed events so I can move from page to page. When I put all of this on RPGMaker, the harddrive crashed and I gave up trying to be creative. A friend showed me chiptunes, and I slowly got back into music. But it wasn't until I stepped out side from watching the Final Fantasy Concert when I realized that I wanted to pull what ever music I had and turn it into 8 or 16 bit.
Now this might be silly or some kind of placebo effect; Exercise. I don't know why, but I run for 30 min to an hour every morning and afterwards I feel so much better about everything. Whenever I eat salads and apples or oranges instead of cookies, I tend to stay more on track with what I am doing. I stopped buy fast food and cooking at home with actual ingredients, and I sleep more sound and wake up more relaxed. Might not work for everyone, and it may be a placebo effect, but the running and changing my food is keeping me remembering all the anime that was on Netflix.