Over-commit: I have to disagree with this completely - if things don't go well it leads to disappointment and being taken advantage of. How about 'be realistic' and 'be communicative'.
Maybe the point is to push people to commit properly? Many people under commit and thus do just enough to satisfy those commitments. I know when I'm super busy I am also super productive. When I was working full time and going to grad school I would go days without reading a 'fun' website. I was slightly over committed, but it drove me to be some of the most productive I've ever been.
It's not me I'm worried about but the expectations of the people I commit to. For example I've done a lot of humanitarian work and once you are seen working for 'free' it's hard to have that conversation about how your time is actually limited. I'm probably still learning how to set boundaries however so my advice (to myself) is 1. set boundaries, 2. commit.
