My insomnia comes and goes. Sometimes it's a couple nights a week, sometimes it's an entire week out of a month. I had thought that it was triggered more by work stuff, but I've certainly suffered it quite frequently since being unemployed. I have the sort that involves not being able to fall asleep. It's not even that my brain doesn't seem to turn off and keeps going over things, but I just... can't cross that Sleep Threshold. Many times I'll get super close, come to the realization that I got super close, get excited... and wake back up.
I've tried actual sleeping drugs, and they don't seem to work that well for me. Melatonin seems to work best, but only if I actually stop reading, turn off the light, and roll over to sleep the very SECOND that sleepiness hits. I seem to frequently miss the window of time that I can effectively fall asleep.
I'm certain that my sleeping habits would greatly improve if I actually hit the gym - when I'm working out regularly, I get THE BEST SLEEP, omg.