Attitude is one of the basic factors that decide whether one can succeed or not. As a salesperson, you must have an attitude of sincerity when getting on with the clients or your colleagues. Only in this way, can you be respected and be considered as friends by others. Anyway, salesman is the representative of the company; he/she typifies the quality of the company and is a bridge which connects the company with the clients. Therefore, a sincere attitude is very important for the sales performance.