Laundry: Dryer is not producing wrinkle-free anything lately. Bought a hand steamer. Works ok but it is hard to hold the fabric down with one hand and keep it smooth.  Dug around an found a device that helps--a large bag clip, like the ones used for potato chips. I clip it to the back of a golf shirt. It weights the soft material down so that my left hand can hold the hem and the right runs the steamer up the fabric. Yes. Up the fabric, I say. 

Kitchen:  Have some old credit cards in the back of the junk drawer?  Great for getting the
crumbs out of hard to reach places in the toaster-oven.  Then use two to scoop crumbs off
the kitchen counter. 
If you paint, use them to spread oil or acrylics on the canvas.  Or do some nice faux stuff on
the walls next time you decorate.

Trash Cans: Save some of that thick (about 3-4") foam padding that comes with printers, etc. 
Next time you buy plastic bags that keep slipping into your nice big trash can, build up the
bottom with these lightweight fillers.  Just cut them to shape the bottom of the can.  Make
build-up about 3-4 inches deep.

Store extra bags in the bottom of the can and twist some twister ties onto the handle. 
Saves a few trips to the garage on clean-up days.

Have 30 gallon bags and 32 gallon cans?  Try this.  Clothesline about 7 foot long.  Make a
loop on end and knot twice for strength.  Encircle can about four inches from the top and
pull the rope end through the loop.  Draw tight and do three half hitches.
Take four metal clips (the 3 inch ones will do).  Space them equally around can and attach
to rope. After you pull the plastic down toward the rope, clip plastic firmly.  This will hold
entire bag against the rim of can.   Lid can now be used so yard debris does not blow all
over.   And you do not have to buy those super- sized heavy mil bags just to fit the can.
  
Garden: The peanuts you get in packing can be used under soil when potting plants.  If you
gather enough peanuts, keep them in a large trash bag.  Bring them to your local
packing/shipping store.  It's good for the environment and you may even get a free faxing
out of it.

Short Doors: There was a time when they touched the floor or an added doorsill.  Now, builders do not even ask if you are planning to put a rug under there.  They just assume. 
Make your own draft thingys.  I'm not much of a seamstress, but think I can handle making tubes out of old sheeting material.  (If you don't have a sewing machine, try a little back-stiching during TV commercials.)  Fill with kitty litter to keep the heating bills down.  Very important if you have a few zones built into your system.   Every little bit helps.

11/7/07
Spackling:   Something came up after I installed shelving hardware.  A hole in the wall.  One of those credit cards would probably work as a tool for that job. 
    Here is the best tip I can give regarding spackling.  I have done repairs for years.  For a smooth finish, instead of waiting for the stuff to dry and then sanding, try this: Wait for your spackle to dry part-way.  Remember to read the product label.  You probably can work it in about a 10 minutes for the quick-drying, a half-hour for the overnight variety.  Wet a small sponge and squeeze most of water out.  Go over your repair patch gently, being careful not to gouge out your good work.  This will take a little experience, but remember, once you get it right, no more white dust to clean up. Your lungs will thank you and so will your sinuses.
    Some years ago, I had a professional spackler as a tenant.  One thing he told me was to keep the spackle at room temp. and do not leave a pail of water in room where you want good drying overnight.  Hope this saves you a little craziness.

4/12/08:
Car Mats: I had written a tip on how to clean car floor mats in the Hybrids entry.  Since you can't get there from here with a link...Use Woolite or a wannabe.  Make a strong solution in cool water and rub really soiled areas in a circular motion with a sponge.  Pour remainder of solution and sponge over entire mat so as not to have super clean looking areas on a grundy mat.  If you have a slop sink (I highly recommend getting one), rinse in cool water.  You can dry mats in your tub or shower stall. When they dry, brush up the nap.