In 2011 I received a Christmas gift from my father. It was a page a day calendar with positions from different chess games. I have decided to share them on my blog under https://gmrazvanblog.com/category/chess-puzzles/
What I like about these positions is that the majority of them are from classical chess games. My first GM coach, George-Gabriel Grigore (I called him GGG), used to show me one classical game in each of my lessons and it helped me a lot to understand chess. I still have a Chessbase database in my laptop named Classics. Study of the classical games should be an important chapter of chess education.