My apprehension and general insomnia tend to keep me up :P
Nothing keeps me up at night. I follow a nightly routine and jump into bed and my dog puts her head on my chest and off I go, into lala land.
Nothing in particular, but i have some sleeping problem due reasons. However, mostly i can't sleep in the right way before different events that i'm involved.
I have to say that some of the comments to this question, one in particular, have me appalled....I just want to vomit. I was told about this "comment" earlier in the day, but chose not to read it until I got home from work as it upset me greatly. You young lady....and I use that term loosely....have just disrespected an entire generation of people, including my father, and many other people I love and care about. Some of which are well respected members of this site. I truly hope that knowing this keeps YOU up at night.....unreal.
Actually ? Not much of anything anymore. I shut everything down and read an hour or so every night and sleep pretty good. Maybe not a lot of hours, but enough for me. About the only thing that does keep me awake or awakens me is my big mouth Basset hound out back barking at something! One of the drawbacks of a doggie door. LOL.
Music. I like to play music really loud (on headphones mostly) and because it's so awesome I get excited and have difficulties falling asleep.
Here ya go, great song
Sometimes when I'm about to sleep all of my rises and falls appear in front of me.
My brain sucks.