Why am I tired?

For a long time now, its been very hard for me to go to sleep and when I do sleep, its been harder to wake up early. This morning, I woke up 20 minutes before I had to be at work and had to book it.

I really think its because I've lost motivation to go to work. And then sitting all day in the office, I come home tired and try to get my own personal stuff done. I finally give up and play on the computer and try to fall asleep. I need a change of routine.