For me it's TV. Especially bad for me is watching before going to bed. TV keeps me awake, stimulates me. After watching I've problems falling asleep, and the s

For me it's TV. Especially bad for me is watching before going to bed. TV keeps me awake, stimulates me. After watching I've problems falling asleep, and the sleep itself isn't recreative. I don't feel really awake after such a night.