Early bird or a night owl?

Surely sleep is one of the crucial things in life that keeps us alive, yet our sleeping patterns are quite different. Some tend to have a good deep sleep others don't sleep a wink, some prefer to sleep at night which the normal is the norm, while others tend to only sleep during the day and stay up all night !!
Why do we sleep at night? And why if we did don't sleep at night do we feel exhausted and lazy? Is The amount of energy that is provided to our body during a night's sleep is much bigger than the amount of energy provided in a day sleep?

Some other questions that might come to mind is  are; why we don’t sleep at night in this case I am not talking about insomnia, insomnia is a disease that is certainly affected by so many factors I am talking about those who are able to have a night's sleep but they don't do it.

Watching TV? Staying up all on night on surfing the web? Can't stop thinking? Working?
All of these might be a common reasons to be a night owl (i.e., not to sleep at night)
The bottom line is whatever your reason don't give up and try to get your a healthy system back going it might take some time if this is your habit but it will work at in the end. One good tip is try to avoid the things that stops you from sleeping properly for some time specially at the time of sleep you go to bed, and prepare yourself for bed in the at the time that you want to get used to sleeping. Whatever happens don't get up.
I suppose that reading is a very good thing to make you doze off a bit and to stop you having the thoughts that might be the cause of your sleepless nights.
Do you have troubles having getting a proper sleep? Did Have you ever?
Do you want to change this?
Did you try to do it before and you failed?
What tips would you give to those who have such a problem?

Finally, I suggest you should be a morning bird not a night owl.

PS: corrections and comments will be more than welcomed.

Cheers

Great job! This is especially interesting as I am not able to sleep well tonight! Haha