The focus on sustainability for personal stuff and professional topics was a good mental guidance to decide which projects to continue, what to start and where to say "No" to for the current moment.
Where to say "no" to...
For example my colleague Wolfram asked for a co-moderation of a coderetreat. That sounded almost too tempting to dive into that topic just now; read a book in preparation and then jump right in.
On the other hand I realised that I do not want to take another project right now. Was hard to decide & verbalize - but: I did it.
What to continue...
Definitely listening. To other people. And to myself.
Asking powerful questions. And listen to other people who ask powerful questions.
Daring to talk about 'obvious' things - because too often they are not obvious to all people involved.
Giving feedback about 'obvious things' as they are as well usually not obvious/common.
What to start...
Overcoming (old) fears, like fear of height in mountains... where I took this post's photo :-).
Taking in good feedback. Really take it in...
Appreciate the little things in life even more.