In addition, participant will receive a palmtop personal computer and be trained in how to use it. Participant will carry this small computer with them from the time of their first visit until their last study visit. Participant will use the computer to answer questions about their mood, stress, and smoking-related issues. Participant will be asked to fill out some questions on the computer each time they have an urge to smoke or they actually smoke. Also, the computer will "beep" at random and set times and request that participant answers some questions.