Another related issue for avoiding costly repairs (or disasters) is the proper operation of a home, including systems and appliances, in a way that prevents damage or prolongs their usefulness. For example, at higher latitudes, even a clean rain gutter can suddenly build up an ice dam in winter, forcing melt water into unprotected roofing, resulting in leaks or even flooding inside walls or rooms. This can be prevented by installing moisture barrier beneath the roofing tiles. A wary home-owner should be alert to the conditions that can result in larger problems and take remedial action before damage or injury occurs. It may be easier to tack down a bit of worn carpet than repair a large patch damaged by prolonged misuse. Another example is to seek out the source of unusual noises or smells when mechanical, electrical or plumbing systems are operating—sometimes they indicate incipient problems. One should avoid overloading or otherwise misusing systems, and a recurring overload may indicate time for an upgrade.
How to DIY it: Coils are located 
on the back of the refrigerator or across the bottom. Pull the fridge away from the wall. (Hint: Grab the sides and pull from the bottom. You may want to lay cardboard on the floor first to prevent scratching.) Clean coils with a coil-cleaning brush (about $10 at home centers), then vacuum. Do this every six months or so.
So a door knob slammed through the wall after one too many times slamming the door. No need to call your handy contractor. You can easily fix a few holes in your drywall by injecting a setting compound (for smaller holes) or by cutting out the damaged sections and replacing them with new drywall (for larger ones). Check out this handy tutorial for more on repairing holes.
While you’re at it: If you don’t have a programmable thermostat, consider getting one. According to the U.S. Department of Energy, an Energy Star–rated model can save you about $180 in heating and cooling costs each year. You can buy one for about $40 and install it yourself. It’s a relatively easy job; no rewiring required. On the other hand, these are home improvement projects you should never, ever DIY.

If you find that drawer slides are bent, rollers are broken or rollers won’t turn even after lubricating, replacement is the best solution. To keep the project simple, buy new slides that are identical (or almost identical) to the old ones. That way, replacement is an easy matter of unscrewing the old and screwing on the new. Remove a drawer track and a cabinet track and take them shopping with you. Learn how to build an under-cabinet drawer here.

If you can’t see any telltale flow marks, and since the stain is fairly small, look at the underside of the roof for ‘shiners.’ A shiner is a nail that missed the framing member, in this case when the carpenter nailed the roof sheathing to the rafters. Moisture that escapes into the cold attic from the rooms below often condenses on cold nails. Sometimes you can spot this if you climb up into your attic on a cold night. The nails will look white because they’re frosted. When the attic heats up a bit during the day, the frost melts and drips, then the nails frost up at night again and so on. The solution is to simply clip the nail with a side-cutting pliers.
Inspect and replace your engine air filter. Just unscrew or unclip the air filter box retainers and remove the old filter. Then hold a shop light behind the filter to see how much light passes through. If the filter blocks 50 percent of more of the light, replace the filter. If not, put it back in, secure the air filter box cover and keep driving. Get the full step-by-step on changing your air filter here. It’s one of the easier things you can do to fix up cars.

An estimate was that in 2003, the market for home-maintenance and repair spending was up 14% from 2001 to 2003.[12] Another estimate was that the market in the United States was $126 billion and was increasing by about 4% annually.[10] American homes are aging; one estimate was that in 2007, more than half of all homes are older than 25 years.[12] And, as populations worldwide tend to become older, on average, and since increasingly elderly people will be less inclined and able to maintain their homes, it is likely that demand for handyman services will grow.[original research?][citation needed]
Some see a benefit of franchising as "entrepreneurship under the safety net of a tried-and-true business umbrella"[15] but forecast a 1.2 percent decrease in franchise businesses during the 2008-2009 recession.[15] In 2005, according to a survey released by the Washington-based International Franchise Association showed 909,000 franchised establishments in the United States employing some 11 million people.[15] Franchises offer training, advertising and information technology support, lower procurement costs and access to a network of established operators.[15]
Sooner or later, every sprayed ceiling is going to get a water stain or a scrape. Spray texture in a can won’t perfectly match every ceiling texture, but it’s usually close, and a lot easier than respraying a whole ceiling. Before spraying, seal the patch with a stain-blocking primer, cover the floor and furniture, and practice your technique on scrap plywood or cardboard. Buy ceiling texture on Amazon now.
When the kitchen faucet leaks, you can’t just call the super. Instead, you have to find a handyman willing to do the work — unless you want to figure out how fix it yourself. But that would mean spending half a day at Home Depot wandering around the plumbing aisle. Buy the wrong materials and you may be back at the store a week later, or calling that handyman anyway to fix your mistake.