To clean- MY ADHD

I think I have ADHD!! Or maybe its my new excuse... I can not for the life of me clean one whole room at a time. I am trying to clean my daughter, Kylie's room today. She is having a sleep-over in a few hours and they need room to sleep and play. I managed to straighten her shoes up in the closet and vacuum the floor. But, the room still looks like its has NEVER been cleaned.
My cleaning goes as follows:
I start in the living room, I pick up toys and then grab the broom to sweep up the dust, dirt and food that has been left by the kids. Done!! But, as I am putting the broom away I notice dirt in the kitchen and sweep that. Walk back to find a toy in the kitchen, put toy away in Peyton's room, notice his clothes on the floor. So, I fold and put away the clothes. Now, I am in his room cleaning up what is in there. He has a cup in his room so I walk into the kitchen. I notice after I put the cup in the sink that the dishes need to be washed. I fill the sink with water and soap and decide to start a load of laundry. Run into the kids room for dirty clothes, fill washer with clothes, shut off water in sink and I am so exhausted I go sit in the living room for a quick TV show. Dishes sit, the laundry washes and I need a nap!
So, here I am in Kylie's room looking at the computer (it's in her room) and decide to check my email. I manage to read and answer my mail and turn to see her room still in a shambles. Why? Why, can I not finish at least one room a day?

Off again to TRY to clean her room. Please give me an idea of how to do one thing at a time.

Lise