Housekeeping:
1) Less is more - declutter and make it a continual process.
2) Set the timer for 7 or 15 minutes and beat the clock.
3) Laundry - I separate the clothes out into a pile for each person and then one for linens before I fold them. Then I just take the pile of clothes and as I fold them they all just pile up, then into a basket. Goes a lot quicker than folding from one mass pile.
Cooking:
1) Cook up multiple pounds of burger, separate into baggies and freeze. Makes for quick tacos, soup, casserole, spaghetti, etc, as you just have to nuke the meat in the micro to warm up.
2) Make sure the dishwasher is empty before you start dinner. (Or if you don't have a dishwasher, make sure the sink is full of clean soapy water.)
3) When dishing out dinner, have a ziploc container ready for leftovers. Dish accordingly then put the rest into the container right away and into the fridge. We dont' overeat, the food has no chance of going bad, and cleanup is half over before I sit down.
4) I put together dinner at lunchtime and then stick in fridge (or at least do as much prep as possible), then have the dishwasher running through the day.
*thought of another one*
5) I tenderize chicken breasts until they're an even thickness, between 1/2" and 3/4" thick. I season with salt/pepper and cook half of them up in my George Foreman, then freeze them. The other half, I just freeze whole to be used later. Since they only take 3 minutes to cook in the GF, I can do a lot of chicken very quickly. On nights where we have chicken, I can have dinner from the freezer to the table in 10 minutes.