What will you do if working under pressure?

I feel so bored with such feeling. Everyday busy like hell in the office make me feel so tired. I try to go back early recently to avoid working long hours. You can say I am lazy. I really don’t like to work overtime. Not because the pay is cheap but I just can’t take the pressure. Actually this is for my own health as well. I can’t imagine that if I continuously working for more than 10 hours a day for a week. I am going to insane!