David Beer provides some really useful quick tips on writing on his blog The Fragment.
I particularly like these tips:
9. If you aren’t enjoying the writing, change the writing plan to bring forward a project you will enjoy (or, alternatively, adapt the thing being written to make it more engaging).
10. Have a writing plan that prioritises topics that make writing enjoyable.
11. Enjoying the writing makes for better outcomes.
12. Plan the writing to give you a reason to read the things you most want to read.