Leaving it clear in the title, if you’re having trouble sleeping at night it’s either some medical problem (of which I have no knowledge about) or it’s that you haven’t done as much as you’d like to, in the day. Everyday we create small goals and keep long-term big ones, so in the day our body needs to achieve some of the small goals and be closer to achieve the big goals. Obviously you don’t have to achieve all, but it may depend on your personality and character on how many goals will you pick for the day and how many will you need to accomplish to feel good; also it would depend on you and how you see the world: in how big/difficult/old have to be the long-term goals you want to “get closer to”.
A well-spent day brings happy sleep.
-Leonardo da Vinci
Going back to the beginning, there are actually many reasons of why you wouldn’t sleep early at night, or why you can’t seep easily. Many factors, including external and internal ones. Either way, the reason I’m pointing out here has to do with you, as a person trying to win a competition against time: you have a maximum of 24 hours to accomplish the goals and, also, sleep.
Many people get up early in the morning and even then can’t sleep at night. Many of them work and have to be here and there, stressed all day. You can’t say those aren’t tired enough. They are as much as you may be. But yet the main reason here is that you’re not comfortable enough for what you’ve done. Not that you’ve done something bad (although that may be a sufficient reason), but that you didn’t do something you would have liked to do at that moment.
Being dissatisfied with yourself is preventing you from sleeping at night. But why?
The human body is somehow programmed to be satisfied, or to look for that satisfaction, for affection and happy moments, as well as being comfortable with who you are and what you can and can’t do. So, searching for that satisfaction, the “timer” that tells you it’s time to bed turns off, as you haven’t reached the level of satisfaction needed, or, in this case (being simpler in the explanation) haven’t reached enough goals so that you can be fine with yourself, satisfied.
This programming also do something else. If we don’t reach the required goals, and start forgetting consciously about them, we start some kind of process in which your emotions will start being a little more negative, and, because of that, your body will try to handle it, counteracting against the sadness with some actions. This action can be everything from eating chocolate to writing or watching TV, being those action different for each person, as everybody’s different.
So, if you want to sleep, you have to think about this, analyze your action a little and see if you’re actually looking forward to accomplish your daily goals. Either you are or you aren’t, you should. So stop doing things like the ones I mentioned above if they are done to balance the lack of completed goals. Do things because you like to, because they help you accomplish your goals, either daily goals or the big ones. And always, please, always set yourself a goal.