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.

When you hire a contractor or specialist, they usually supply the materials, and often at a markup. If they don't provide the materials, they may not guarantee a repair, or your choices are limited to what they have in stock. When you choose your own materials, you know how much the product costs, and you can stay within your budget. You also get to choose the manufacturer, finish and register any warranty agreement.
How to DIY it: Clean up any rough edges around the hole, then stick the patch onto the wall over the hole (left). Using the taping knife, spread a layer of joint compound over it and let it dry overnight. Then spread a wider second coat, feathering out the compound on all sides to make the patch blend in. Let it dry, then apply one more coat extending 8 to 12 inches beyond the patch in 
all directions. After the final coat dries, sand the area with a sanding sponge (a foam block wrapped in sand­paper) until it feels smooth and even. Prime, and then paint.
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]
You can reschedule or cancel your service at any time. To reschedule, simply go to Your Orders, find your service order and click on the ‘Contact Provider’ button on Your Orders page. To cancel, click on the 'Cancel Order' button on Your Orders page. Payment goes to the pro from your secure Amazon account. Because you aren't charged until the actual work is completed, cancelling a job doesn't require a refund.
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.
How to DIY it: This job can be messy, so protect nearby surfaces by covering them with plastic or cardboard. Spray the springs with garage door lubricant (about 
$7 at home centers). Don’t use oil, grease, or other lubricants. They may be cheaper, or you may have them on hand already, but they won’t work as well and tend to pick up dust and grit—just what you don’t want on moving parts.