Inclusion Criteria:  Age 21 or older Able to read and respond in English Diagnosis of non-small cell lung cancer or small cell lung cancer Documented curative treatment plan including systemic therapy +/- radiation and +/- surgery  Completed cancer treatment within past 3 weeks  If final treatment is systemic therapy +/- radiation: within 3 weeks after cancer care team determination that treatment is complete If final treatment is surgery: within 3 weeks after hospital discharge following surgery  Exclusion Criteria:  Comorbid health condition that would interfere with study participation Current participation in cognitive behavioral therapy treatment