What tips do you have to encourage someone with a mental disorder to take their medication?

Honesty and caring. Mental disorders are difficult to treat in the best of circumstances. Part of the problem is the person may not believe that they have a problem. Give honest feedback about their behavior, mood, thinking; that they do/do not seem like their usual self. Speak honestly, offer to listen if they want to talk about medications or their frustrations. Remember, medications are tools for a better life.