Chess maxims are abound, especially from acclaimed players like Siegbert Tarrasch who was the authority in explaining the importance of chess rules in his time. Today we have a summarised guide of these bits of advice in the form of the 2 books below: This is the principles book for the intermediate player rated perhaps 1500 and above. The 17 chapters offer a wide range of advice from Attack, Move Selection, Calculation, Defence, Tactics and even Tournament tactics. I like #137: "The most important novelties are hidden in the games of the old masters" That's why the study of the games of Alekhine, Nimzowitsch and Capablanca will gain you valuable insights on some of the plans they've used and are likely to spin off in positions of current theory. ...