[Stylist] Writing at night

[Vejas Vasiliauskas]

Hi, 
I know the answers to this question are going to vary, but I'm still very curious about peoples' thoughts. 
If you come up with a new idea for a story or poem while already lying down in bed, do you get out of bed and start writing while it's still fresh, even if you know you will lose sleep? Or do you just store the idea in your head and wait until you have some time the next day to write it down? 
Thanks, 
Vejas