Step one to a good weekend is dealing with the essentials. Do these things on Thursday night or Friday morning or first thing when you get home Friday after work.
1) Water: Go get a big glass of water right now. Now. Do it. Water is the means for your body to do a little Discardia of its own. Purge out the bad stuff; set yourself up for the good stuff. Drink that glass of water all up while you put in this little chunk of progress and then refill it when you're done and have another.
2) Food: Nothing fancy, just eat a small meal with something good for you and something yummy. And while you're preparing it, if you come across anything spoiled in the fridge don't you dare set it back in there. Throw it in the trash and carry that nasty baggage out of your house.
3) Sleep: Are your sheets dirty? Change 'em now. (Always have a clean change of sheets; it radically improves your quality of life.) Now lie down on the bed for a moment and see what the first thing you're going to see when you wake up is. If you don't like it and it isn't nailed to the wall, get it out of your sight. Maybe it’s just clothes strewn around. Maybe it’s something that doesn’t even belong in the bedroom.
4) Motivation: One more step. We took care of the last thing we see before sleeping and first after waking. Now make sure that walking in the front door doesn't drag down your mood. Straighten that doormat, tidy that shoerack, put away (or at least move) that clutter in the front hall. Let the first sight of home remind you of what you like about this place, not of your to-do list.