Keeping the house clean
We joke in our family that Martha Stewart would develop an inferiority complex if she hung around with my mother in-law. Homemaker extraordinaire, I often lean on her for tips (as I'm a homemaker mediocre).
When asked how she keeps her house so clean, she said, "I just never let it get dirty." Hm. Of course she's an empty-nester, and my nest is decidedly full, but that's beside the point. My husband reports that the house was spotless even when he and his brother were kids.
I'm working on disciplining myself to put things away after I'm done with them. Clean up the dishes as soon as we're done with dinner. Deal with small messes before they turn into big ones. Trying to teach my kids to do the same. Keep your fingers crossed.
Need more guidance? Here's Real Simple's Keep-It-Clean Plan.