Further, we should recognize common terminology such as Purpose, Situation, Problem, Cause, Solvable Cause, Issue, and Solution. Even Consultants, who should be professional problem solvers, are often confused with the terminology of Problem Solving. For example, some consultants may think of issues as problems, or some of them think of problems as causes. But issues must be the proposal to solve problems and problems should be negative expressions while issues should be a positive expression. Some consultants do not mind this type of minute terminology, but clear terminology is helpful to increase the efficiency of Problem Solving. Third, there are several useful thinking patterns such as strategic thinking, emotional thinking, realistic thinking, empirical thinking and so on. The thinking pattern means how we think. So far, I recognized fourteen thinking patterns. If we choose an appropriate pattern at each step in Problem Solving, we can improve the efficiency of Problem Solving.