Fortunately, there are a variety of methods to improve sleep. The most important intervention is to ensure good sleep habits, avoiding exercise or stimulants such as caffeine in the evenings and using a routine leading up to bedtime. However, when trying to overcome brief problems, the medicines that you have tried are good for a start but only for short term help. It is important to avoid habit forming medications like ambien and ativan for any use beyond 4 days. You may wish to discuss some non-habit forming alternatives such as mirtazapine and trazodone with your physician.