Accountability. Maybe you can give yourself a deadline and hold yourself to it. Maybe a project like NaNoWriMo where a ton of people give themselves the same deadline would be good for you. Maybe you need to get a friend to periodically ask you how your writing is going.
Break your routine. Go somewhere different to write once in a while. A coffee shop. The library. The great outdoors. Some place where you don’t have to tune out your usual distractions.
Create bonus material. Maybe you write songs or poetry. Maybe you make graphics with relevant pictures and song lyrics (see example below). Maybe you draw your characters. These things might be just for you, even if you plan to publish what you’re writing, but they can help you stay involved in the story even when you don’t feel like writing.
Discuss your characters with others. One of the most motivating things is finding someone who shares your love of your characters and wants to know what happens to them.
Experiment with AUs. So you’re writing fantasy. But what if you change it up? What if your characters lived in the real world and had to file taxes? What if they were superheroes (or villains)? What if they were spies? Figuring out these things can help you get to know the nuances of your characters, and that can only help.
Fanfiction. Writing with characters and a setting you already know well is great practice.
Generators. You can find random generators for lots of things. I find them especially useful for naming characters or places. This website has a lot of different options.
Help someone else. Read their writing. Have a word war. Offer encouragement. It’ll be good for both of you.
Ignore advice that doesn’t make sense to you. People like to share things that work for them. But writing is a very personal activity. It’s okay if a method that works beautifully for someone else doesn’t do anything for you.
Just write. Sometimes the best thing you can do is just get something on paper. It might stink. But it can be edited. And it might give you the inspiration to go on and make something better.
Keep taking care of yourself. Food and water and cleanliness and healthy relationships are important and keep your brain functional. You kind of need your brain for writing.
Learn from what you write. What works? What doesn’t work? Can you figure out why?
Make a playlist of songs that remind you of your characters and your story. This is good for plotting and for putting you in the mood to write. Here’s one I made a while ago.
Notice what you love in books you read. Try that.
Observe people. Truth is stranger than fiction. You might get ideas.
Practice, practice, practice. (The video is only slightly relevant, but it makes me happy.)
Quit when you need to.
Research. Really. It can be intimidating, but once you get going, it can also be interesting and fun. And you might learn things that will give you ideas you never would have thought up on your own.
Set a timer. If you keep procrastinating, sometimes forcing yourself to focus for just five or ten minutes can get you into the swing of things. And if not, at least you have five or ten minutes worth of writing done.
Take a shower. Put your body on autopilot and let your imagination work its magic. Being clean is a nice bonus.
Use what you like. Write with pen or pencil, in a nice notebook or on scraps of paper, speak into a tape recorder, type on a computer or your phone… Whatever works.
Visit places your characters visit, if you can. It adds a fun new dimension to the writing experience.
Written? Kitten! gives you a picture of a kitten for every hundred words you write. Very inspiring.
Xerox everything. Make backups. Whether that’s physical copies or saving documents on flash drives or uploading them to the cloud. Lost writing is sad.
You are the expert on your story. People can give you lots of expert editing advice, and much of it is certainly worth considering and using, but in the end, the story exists in your head.
Zone out and tell yourself stories. When appropriate, of course. Probably not when you’re supposed to be helping customers at work or things like that…