Can I blame the mess in my house on a tornado?

I guess only if the tornado is my lovely 3 year old DD and her accomplices, the dogs. I'm always proud of myself when the house is really clean but it only seems to last for, uh maybe a day or two? When I was pregnant with DD I had a system of what got cleaned on what day. This really helped me keep up on housework but things seemed so much easier then lol. I tried to go back to this old system; however, it doesn't seem to work for me like it did before. I don't know, I think I'm in a cleaning funk. During the week when I work, I feel so tired by the time I get home and I just want to spend time with DD and make dinner, etc. that I don't have the time or the want to clean the house after a long day. I try to do my housework on the weekends but then it gets ruined during the week and we're back to square one. I guess I just have to experiment with different techniques and strategies and see if I find something that works. Anyone have a plan that works for them?