During the week - wait until the wife goes up to bed usually around 9 PM and then cram as much as I can take before weariness overtakes me - that's usually around 1 or 2 AM and back up around 5:30 to start the work day. Weekend - try to sneak a quick session or two during the day if the wife is running errands, but anything longer waits until the evening and only when we're at home and not gallivanting about the town... after all - we still need to maintain a healthy relationship with our spouses.