I normally start around 6:30pm and wrap up btwn 7:30 and 8pm. Then shower. I normally go to bed about 9:30 or so. Most nights I have no trouble conking right out. I have the occasional sleepless night, but so does everyone. I've been doing it this way forever, so I may have just adjusted. Interestingly, on Tues and Thurs I do my cardio in the morning due to my work schedule, and on those nights, I seem to have the most trouble falling asleep - it takes a little longer even if I am just as tired. I think exercise helps get out any stress from the day, which makes sleeping easier. Very rarely, I don't get my workout in on Tues/Thurs morn, so I end up doing when I get home at 8, and finishing about 9 or so. Then I will go to bed about 10, but still, no snoozing problems.
Nan