I don’t do New Years resolutions either but as many, I (re)set some SMART goals.
I usually create a mindmap to make sure I have a broad and complete idea of the fields that need my attention.
I still need to do that exercise for 2024 but I have a good idea what it will include.
Some of it will be expandign chord knowledge AND knowing where and how to use these shapes and flavours. Some new covers, some writing for solo and band, some tech ideas (replacing classic cab with PA/FRFR unit) etc.
Over hte years, I found it easier, less overwhelming and more flexible to make small, achievable things and build on that moving on. A Year is LONG is you do a lot of small things to build a big one. For me, this approach of many small iterations is how I did tihngs as a kid and now the corporate world calls it “Agile”. 
I could lose a bit of weight though. Also there, small iterations, I’m gonna start with 5 minutes of exercise a day and gradually add. I’ll use the principe of ‘showing up and doigngthe reps’. As justin recommends it, I do too, Atomic Habit (James clear) is free as audiobook on Spotify and perhaps a good idea to check out for the New Year!