Well for one, the last two years are enough to make it hard for anyone to have an easy time to be creative. Even if you don't feel it daily, the mental stress of the last two years is weighty and can make it hard to feel like really sitting down and writing (or other creative pursuits of choice).
That said if you really want to make it a practice, then don't think about having to sit down every day and write on the same story every single day. You don't even have to finish something. It's okay to just sit down and write, to write, regardless if it's on a project, something you throw in a drawer, or whatever. Personally I find the habit tracking aspect really frustrating for myself - the idea I need to write a certain number of days or a certain number of words every time. So my goal is just to write. Sometimes it's 10 words, sometimes it's 100 or 1000 but sometimes it's 0 and that's okay too. I find those days when I sat down and wrote like 10k in a weekend were more hyperfixations than actual practice. Those words weren't good and I lacked the ability to edit them... but it did feel good to have so much written. Which is why at least to me it feels hard when 10 words is hard to come by. But these days I also have a healthier view of my mental and emotional wellbeing, so why beat myself up over 100 words that feel like pulling teeth?
For me, a mix of types of writing feels easiest (some blogging or personal writing, some fiction/fan-fiction, some poetry... or a mix of stories/genres, so I always have something to switch out to if I know that I want to write but won't be able to focus on a specific thing). And sometimes it's just chasing the dopamine muse - writing 500 words of something new that I'll never finish or never pick up again (probably). It's writing, it's creative and it help keeps up the habit.
And if you struggle for things to write about on those off-days, I recommend keeping up various prompt lists (titles/words/themes) so you can always look over a variety of prompts to see if something sticks out in particular.
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That said if you really want to make it a practice, then don't think about having to sit down every day and write on the same story every single day. You don't even have to finish something. It's okay to just sit down and write, to write, regardless if it's on a project, something you throw in a drawer, or whatever. Personally I find the habit tracking aspect really frustrating for myself - the idea I need to write a certain number of days or a certain number of words every time. So my goal is just to write. Sometimes it's 10 words, sometimes it's 100 or 1000 but sometimes it's 0 and that's okay too. I find those days when I sat down and wrote like 10k in a weekend were more hyperfixations than actual practice. Those words weren't good and I lacked the ability to edit them... but it did feel good to have so much written. Which is why at least to me it feels hard when 10 words is hard to come by. But these days I also have a healthier view of my mental and emotional wellbeing, so why beat myself up over 100 words that feel like pulling teeth?
For me, a mix of types of writing feels easiest (some blogging or personal writing, some fiction/fan-fiction, some poetry... or a mix of stories/genres, so I always have something to switch out to if I know that I want to write but won't be able to focus on a specific thing). And sometimes it's just chasing the dopamine muse - writing 500 words of something new that I'll never finish or never pick up again (probably). It's writing, it's creative and it help keeps up the habit.
And if you struggle for things to write about on those off-days, I recommend keeping up various prompt lists (titles/words/themes) so you can always look over a variety of prompts to see if something sticks out in particular.