I try to sync my working out with my showers, so I don't usually have more than one a day. I will also sometimes do a workout/shower at night before going into work early. Then I can just do a quick whore's bath and leave for work to get their as early as possible.
Flex time is nice. I'm done exactly 8 1/2 hours from when I clock in, so expediting the morning routines means I get to go home earlier.