It can be easy to get caught up in all of the (wonderful) tips for better living you'll find doled out in spades on sites like Apartment Therapy, but when it comes to putting everything in practice, it can easily become just another task on top of an already monumental pile.
While I'm not saying the answer is to give up on a cleaner/better/healthier/enter-awesome-descriptive-word-here environment and revert to your sloppier self, I am suggesting an occasional dose of perspective can't hurt. The thing is this; better habits make for a better life, but it's not going to happen overnight, and it's not going to be perfect 100% of the time. I don't care if you're Gwyneth Paltrow. It just won't.
So here is my anti-advice advice, take it how you will. Take smaller bites: instead of tackling everything at once, figure out what small task you can tackle now, then take pride in doing it instead beating yourself up for things you haven't done yet. Don't set yourself up for failure by creating laundry lists of things to get done in one day — divvy them up over a week or even a month and just focus on completing 2–3 each day. Finally, if you need a break, take a break. While it's not ideal to let things slide, it's better to let them go until you have the time to properly devote to them than it is to burn out or only do things halfway.