You are mentally occupied that is a reason that the anxiety obstructs your normal course. One of the easiest way which i follow is to channelise your mind into something which relaxes you an hour before sleep. Like you can watch some really light fun show before you go to bed. As your mind is engrossed in it, the daily anxiety reduces. I watch friends or modern family. Never consciously try to sleep, that doesn't help. But a lil diversion of mind helps.