The Rockafeller Habits come from an author named Verne Harnish (2002). He's more of the Peter Drucker School of helping hierarchy live with itself but has some very useful tips. Here you go:
1. Habits List
Springest.nl is definitely using OKRs and has a "BGAH" (big hairy audacious goal) and maybe daily standups. Ruben would be good to talk to here.
If you don't know it I recommend looking at something a VIISI employee (Marc-Peter) introduced me to which is running Holacracy with the "Eisenhower Matrix". It's very Stephen Covey and has helped our team on a weekly basis with our A over B over C prioritization for Lead Link Heuristics and standups.