(So while my results are not yet showing any impact, my mindset seems to have changed!)
In addition, I learned a new word which shall represent my new attitude:
Gumption ("Shrewd or spirited initiative and resourcefulness") - ever heard about it?! 8-)
Next to the above (working with "Chess for Zebras"), I was working with my Lommer tonight: I worked on and solved two positions (but rather easy ones). The one below is "nice" - as it finally pays off that I did some basic endgame training some weeks ago:
Can you spot the correct move by White?