Overwhelmed

How do you all do it? How do Moms and some dads keep it all together? I just can't seem to master this. We are going to be going through some big changes in the next couple months and they are stressing me out. We are listing our house for sale and the idea of having to get it in order scares me. I have let it tailspin out of control for so long I have no idea how to take charge. Everywhere I walk there are toys or reminders of kids. Forgot wrappers, books, crayons, pencils, shoes everything. I need a system to get it all decluttered and cleaned up but the idea depresses me. Needless to say much like the rest of America we live a super busy life. Kev and I both work till 5 and then we try to fit in as much time with our kids before bedtime that by the time 8:30-9 comes around cleaning is the last thing we want to do. On the weekend we are so busy trying to catch up on sleep, driving to and from birthday parties or visiting our parents that we don't make time to clean. How do you all do it? I really need suggestions or schedules to follow. I can hardly remember the last time I dusted. Sad I know.