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.
Don’t let your toilet be a mysterious device in the corner of your bathroom: Toilets actually operate by very simple mechanisms that are easy to understand. The majority of toilet issues—clogs, continuous running water, loud noises, etc.—can be solved with the quick purchase of a replacement part and some tinkering in the tank. Don’t be afraid to open it up and take a look. Also note: These are the things you should never, ever flush down a toilet
If you are willing to buy and pick up the materials yourself, you avoid paying for shopping and pick-up time. But you may find it inconvenient, strenuous, and time-consuming to pick up a load of bricks, a few large sheets of plywood, or similar items. If the company will be doing the shopping and buying, get the company to commit to the time and cost for that task; some will agree that there will be no extra charge.
If you can see light creeping beneath exterior doors, air is also escaping. Grab a few packages of self-adhesive rubber foam weatherstripping and go to town, sealing any and all doors that lead outside. Weatherstripping already installed but you’re still suffering from a high gas bill? It might be time to replace the strips installed by the previous owners. Check out this handy tutorial on installing weatherstripping. 
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