Whenever I have a panic attack, regardless of whether it was in the morning or evening, I become terrified of falling asleep (it's the whole fear or dying or something equally awful happening whilst I'm asleep). Sometimes I put the TV on to an interesting show (which any other time guarantees I'll fall asleep!). Other times I'll do some crossword puzzles or read something that doesn't require full attention, like a magazine or book of comic strips (the Far Side books work very well). I do these things in my bed and sure enough, I wake up with my face smooshed into a book, or the remote hanging out of my hand. Another thing I do is play word games or try to do all the state capitals in my head (which embarrassingly enough, I can't do) I think the key is to do something that distracts you, but something that won't "energize" you more than you already are.
Hope this has been helpful.
betty