One thing that probably helps me stay motivated is listening to the 80000 hours and the future of life podcasts. It’s lower effort (for me) than e.g. reading essays and hence a good option for periods where I’m especially busy. I don’t know how motivated I’d feel without them, but I suppose hearing from lots of people who try to improve the world can be uplifting and maybe even more personal than blogposts. This might not work if you’re not a ‘podcast person’ though.