You should join some of the cleaning/declutter threads in the Self Help/Goal Setting part of the forum!

My house is also too messy to let anyone in, even people who want to help. The only people I let over are ones who I know are just as messy as me. I find that the problem with cleaning is that it is not just a do it once and you are done kind of thing - you have to keep up with it every day or it just descends back into chaos -- and once it is in chaos, it's very difficult to find motivation to do anything about it.

I find setting a timer helps a lot. I like knowing that it only takes 7 minutes to do a load of dishes. I also set a timer to pick up 100 things in five minutes -- it's nearly impossible to do, but you can get a lot done in five minutes when you're running!