Chess Puzzles vs Laziness Does solving chess puzzles help in overcoming laziness? I lost many games in a tournament because I am too lazy to calculate variations, e.g.: calculating 4-5 moves deep when defending to be sure that I will not be down in material.
From personal experience doing puzzles has no effect on my level of laziness. What it does, which is more important for me, is widen my thinking. I become less narrow in the possibilities I will consider simply because I have seen unlikely moves work in the puzzles I've tried.

Overcoming laziness is more a problem of motivation, will and energy. 

Tony Miles used to tell the story of when his doctor prescribed beta blockers for him for a medical problem. In his next tournament he lost the first three games. Although this was bad enough it was not what really worried Miles when he tried to work out what was going on. The problem for him was that he was losing and he just didn't care. He blamed the beta blockers for this and stopped taking them with the result that he started caring more during the game about his position and so started winning again.