According to scientists, there are two ways of thinking: slow and fast. And the slow way makes ever so fewer mistakes than the fast one. The fast way is intuitive and liable to make mistakes. (Look it up.) Hence, spending a lot of time is the solution to chess. In online chess games, don’t play 5+0 Blitz games. Rather, play 30+0 Classical games.
And hence, Grischuk is my favourite chess player. (He always suffers from time trouble.)