I've heard it from many: why make the bed when you are just going to get back into it that night? Well, for one thing, I like for things to look tidy and making a bed makes a bedroom 90% tidy all by itself. For another, my bedroom is visible from our dining room table, which is usually where we are entertaining guests. For another, when you leave it unmade, all those sheets that you put your face on all night long are open to catching whatever dust falls on them—and I have a dust mite allergy.
But as for that reason most people give, "why make it when you are just going to get back into it?" Let's think about that for a few minutes. Why wash your clothes when you are just going to wear them again? Why wash the dishes when you are just going to eat off of them again? In fact, why cook dinner when you are just going to get hungry again? Doesn't work so well with all those things does it?
What I am afraid of is that attitude will bleed off into something really important, like why try to overcome a temptation when you know you are just going to sin again? I hope you can see that one really doesn't work. Overcoming once will make it easier to overcome the next time, and then the next, and then the next, and someday you may find yourself sinning less often. Isn't that what you are hoping for? Not to mention, God always gives you a way out. Try working your little argument on him after he has gone to all that trouble, and his Son has died in order to help you win those battles over Satan.
No, it isn't a sin not to make your bed, not even if your mother said it was, but be careful with the arguments you use for the simple things. Don't let it affect the things that really do matter.
For everyone who has been born of God overcomes the world. And this is the victory that has overcome the world— our faith (1John 5:4).