Methods and Procedures: Ten participants will come in for four, 45-minute assessments, for a total of 3 hours, over a 3-week period. At each visit, smoking behavior will be assessed using either the palm pilot or paper and pencil recordings and carbon monoxide and salivary cotinine will be measured. Training will be provided in the use of the palms and participants will do a "trial" recording of data before their actual data are recorded. In addition, during each week in which participants use Palm Pilots, they will be asked to come into the clinic for a mid-week visit to have their Palm Pilot charged and synced with the computer. No assessments will be completed during these mid-week visits.