College students with difficulty falling asleep were treated with either progressive relaxation, systematic desensitization, or a thought control procedure. All three treatment groups showed significant lower latency to sleep onset times than a waiting-list control group at the end of the three-week treatment period. A three-week followup revealed that all three treatment groups maintained their improvement. The success of the progressive relaxation and the systematic desensitization procedures corroborates earlier evidence while the success of the thought control procedure suggests that there may be a cognitive element contributing to pre-dormitional insomnia (e.g., mind-racing, ruminations). (Author)