Cognitive behavior therapy, daily exercise, especially in the mornings, and stress management strategies such as meditation and yoga can improve sleep.
Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis. Ann Intern Med. 2015 Aug 4;163(3):191-204. doi: 10.7326/M14-2841. http://www.ncbi.nlm.nih.gov/pubmed/26054060