I'm a nerd re: productivity systems, so here's a thread of some books and things that helped me this year, and might be helpful for some of you making New Year's resolutions:
I like books that use behavioral science and / or neuroscience to guide recommendations. To that end, @bjfogg 's Tiny Habits is really good. Maybe the best productivity book I read all year.
The best one I read last year was @jamesclear's Atomic Habits. It's a quick, easy read and it prompted me to start habit tracking, which has been really useful:
I don't have hyperactivity issues but I have big inattentive issues, so CBT strategies for adult ADHD have been very helpful for me. This one's a little pricey, but had some techniques that I hadn't seen before:
This one is about systematizing research and ideas using a methodology called Zettlekasten that was developed by a German sociologist.