There are always people who find it difficult to work or study in isolation, so adult students of this type should consider finding a study partner. It might be impossible to find someone taking the same classes they are, but a study partner can be there simply to help them spend the time they need to study. While there might be no interaction on an academic level, the study partners will at least know they are not alone in their pursuits.
Studying with another person or a group requires a solid commitment, so joining a group is a good idea for someone who finds they are constantly behind due to distractions. Rather than sit at home and attempt to study while doing the laundry or cooking dinner, they might go to the house of a study partner where there is little to keep them from class work. It is the commitment to the other person that will help them accomplish their work, and they will have a better chance to finish their schooling on a reasonable schedule.