To keep your kitchen (or any other area) clean, you don't have to take a whole day, or week, to do it. That's hard to schedule anyway, and usually overwhelming. Yet there are some deeper cleaning things that need done- like cleaning out kitchen (or bathroom) drawers, wiping the tops of the cabinet doors, or cleaning the nooks and crannies in them. Here's what I do now:
Every now and then, when I open a drawer, I notice there are crumbs in the corner. Or in one of the organizing baskets. Or maybe there's some sticky line where a child spilled their juice down the front of the cabinet. If it's a two-minute job or less, I clean it right then. Most of these things are. If it's done then, it doesn't have to be added to my already-huge "To Do" list in the back of my head. That takes a load off me. Dumping out the whole drawer, wiping it out, and putting everything back will take only a couple minutes more. If I happen to have extra time, I may go on to the next drawer. If I'm wiping a cabinet, I usually finish wiping all the cabinets on that side of the kitchen.
It doesn't all have to be done at once. Just clean little bits as you notice them. 2-5 minutes a day gets the job done in a hurry, without leaving you frazzled!