I actually find it quite disturbing. When your conscious mind has been very focused on something the whole day it will naturally keep the momentum. That in turn makes it difficult to fall asleep and when you do the sleep is often quite thin. What I figured is that if you find a way to turn your mind off either with meditation or some distraction (for example movie or book), the sleep is much better and the next morning is usually much more productive and often the mind comes up with some suprising new ideas.
I had the trouble of going to bed but my mind was racing with ideas, and I could not fall asleep. I noticed that taking a notepad next to bed and writing down the ideas or seeds of ideas I could get them out of my mind and my mind could be at rest and I would fall asleep.
I think it releases the mind from trying to remember the ideas in the morning. When I write the ideas down I can review in the morning with the benefit of having a good nights sleep.
I do this too. It's also worth buying a light pen to keep by your bed so you don't have to turn on a lamp and blind yourself. It makes getting back to sleep easier too.
