one way we have found that helps is NO LIQUIDS after 6pm; being sure to go to the bathroom before bed...in my (care-giving world) bedtime is about 10. we did work with the dr and tried a 2 hour bathroom schedule for awhile-- i would go get grandma up every 2 hours for the bathroom, we used a bed side comode so she didn't have to go far, and she appreciated not having a soaked bed in the morning. after about 2 months she did not need to go every 2 hours, we moved it out to 3, then to 4...now (she's 97) she drinks nothing after 6pm (except a little drink to take meds) and she goes before bed, and i go in after 4 hours and wake her and ask if she needs to go...most of the time the answer is yes. and then she can sleep in until 8 or 9am without accidents.
has been about a year since we started with the 2 hour schedule---been on the 4 hour one for over 6 months-it works for us...