I spend a good chunk of my time cleaning whenever I can steal away time from the kids. Lilyann is allergic to dust and mold, so I'm not taking any chances. I also, like any normal person, am much happier in a clean home! So, when I'm asked "what are you doing today?" my answer is almost always "cleaning _____ ______ and ______." With an explorative three year old running around there is ALWAYS something that needs to be cleaned. I've come to realize that dishes, laundry and bathrooms need to be taken care of on a daily (sometimes 2x's daily) basis or everything will start to get overwhelming.
Even if I'm exhausted, I'd rather work a little harder for a little longer then rest and wake up refreshed, and happy because my house is clean. Compared to waking up and wishing I didn't have to wake up to a messy house.
So, if you have problems cleaning- my advice? Just DO IT NOW and rest later. That way while you're resting you can actually quiet your mind instead of sitting (or laying) around thinking of all the things you need to get done.
Besides, cleaning is a GREAT workout. Need to do core work? Sweep and mop your floors while doing squats and lunges. Sure, it may look funny but trust me once you start feeling the burn you know it's working. Also, tighten your tummy muscles as you're mopping. This works GREAT if you have small children that spill things all the time. Your arms, abs, legs butt and back are all being worked. The messier the floor the better!
So, lesson learned, just get it over with and you'll be happy that you did!
Also, if you need to clean and have no energy or motivation, turn on some music! Music (for me anyway) makes you want to move so then you get moving! Dance while you clean you'll burn twice the calories! Make sure you drink water as you go or you'll dehydrate yourself. Happy cleaning!