Poorly maintained or out of tune cars are a significant source of pollution. These driving techniques won't work if you don't properly maintain your car, which you should do whether you're hypermiling or not: Keep your car tuned up. Out of tune cars are more inefficient and produce more pollution. A regular schedule of maintenance for you car is the first step to even having a car you can hyper-mile with. Use high performance spark plugs. High performance spark plugs like iridium-tipped "performance" spark plugs create a larger combustion spark which contributes to fuller, more efficient burn in the combustion chamber. This provides slightly more power, better fuel efficiency and lower emissions. Use the lowest viscosity oil that is recommended by the manufacturer. Using anything lower than what is recommended can be unsafe. If the car is not "taking oil" - burning it or leaking - switch to synthetic oil (and ATF), as those greatly reduce internal powertrain friction, improve mileage and longevity. At the same time, oil changes can be done much less frequently, thus compensating for higher oil cost. Consider using very lightweight 0W-20 motor oil. Lightweight motor oil reduces the amount of work your engine has to do since it's easier to pump. Using 0W-20 motor oil can help to increase the engine's mileage, but at the expense of potentially reducing engine life. Correctly maintained tires are very important to hypermiling - they're the only way that your car touches the road, and incorrectly maintained tires can cause significant fuel inefficiency. Align and balance the wheels. Car wheels are sometimes worn down unevenly or weighted or aligned very slightly off-center, which reduces efficiency. Check tire pressure regularly. If the tires are incorrectly inflated, then there will be excess drag, or insufficient surface contact with the road, causing significant decreases in fuel efficiency. Don't over-inflate tires to increase rolling or coasting distance. This can lead to increased wear and loss of traction. In extreme cases the tires may pop causing a catastrophic accident. Make sure you have clean headlights and that they are working properly. For many hypermiling techniques you'll be varying your following distance from cars. Seeing the car in front of you is vital for safety as well as for efficiency. Get rid of the "junk in the trunk" the more weight you're carrying, the more the engine and drive-train have to work. Removing extra weight increases efficiency. Don't remove stuff from the trunk you might well need! A percent or two mileage decrease is much better in both time and fuel than a long, otherwise unnecessary trip to the mechanic because you took the spare tire and tire changing kit out of your car.
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One-sentence summary -- Maintain your car for hypermiling. Maintain your tires and wheels for hypermiling. Take stuff out of your car.

Inhaling steam helps break up mucous and can moisten your throat. Start by filling a pot with water. Place it on the stovetop over a high flame and bring it up to a boil. The size of the pot doesn't matter, as long as it's large enough for you to put your face over. When the water boils, turn off the heat and move the pot to a new location. Place a towel or hot plate down so you don't damage the surface, and make sure the pot is at a good height for you to lean over. Be careful when handling the pot. Wear oven mitts or use a towel to move it. The steam from your showers will also help moisten your throat. Whenever you bathe, take some deep breaths to draw the steam into your throat. If you don't have a humidifier, then sitting in a bathroom with the shower running a few times during the day can help moisten your throat.
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One-sentence summary -- Boil a pot of water on the stove. Move the pot to a heat-proof surface. Moisturize your throat more by breathing deeply in the shower or bath.

Line a baking sheet with parchment paper or nonstick aluminum foil. Place the shaped sopes on the lined baking sheet. Cook them in your preheated oven for approximately 10 minutes, or until they feel firm to the touch. Keep at least 1 inch (2.5 cm) of space in between each sope when you arrange them on the baking sheet. Unlike fried sopes, baked sopes won't gain much color after being cooked through. As long as the sopes are firm, however, they should be ready to use and enjoy. Once the sopes have finished cooking, remove them from the oven and set them aside in a warm area while you prepare the filling. It's a good idea to cover the sopes with a clean, dry kitchen towel to help them hold in more heat.
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One-sentence summary -- Preheat the oven to 375 degrees Fahrenheit (190 degrees Celsius). Bake the sopes for 10 minutes. Keep warm.

You will need four pieces of ribbon that are long enough to wrap around the box lengthwise, plus an additional 2 inches (5.08 centimeters). For a unique look, consider using two pieces of thin ribbon, and two pieces of slightly wider ribbon. You can also use two contrasting colors instead. Thick and/or wired ribbon is not a good choice. Use thin satin or balloon ribbon for best results. Use the same ribbon as in the previous step. This time, cut the ribbon long enough so that it can wrap around the box widthwise, plus 2 inches (5.08 centimeters). Take the four long ribbons, and set them down on the table. Make sure that they are parallel to each other and spaced no more than inch (0.64 centimeters) apart. If you used different widths and/or colors, be sure to alternate them. Place your gift face-down on the ribbons. The box can be centered or off-center, depending on where you want the ribbons to be. Wrap and tape each of the ribbons one at a time; do not tape all of them at once. Pull the ribbons firmly around the box so that they are nice and snug. The ribbon ends will overlap each other by about 1 inch (2.54 centimeters). Make sure that you are only taping the top ribbon to the bottom ribbon; don't tape the ribbons to the box itself. You can also use glue dots (found in the scrapbooking aisle of an arts and crafts store) instead of double-sided tape. Place a strip of double-sided tape onto the end of each of your short ribbon. Arrange the ribbons right above the first, long ribbon, making sure that the ends are perpendicular to it. Once again, keep the ribbons spaced no more than inch (0.64 centimeters) apart. Pull your short ribbons around to the front of the box. Weave the first one over and under across the first set of ribbons. Weave the next ribbon under and over, and so on. Continue weaving until you have woven all four ribbons. Flip the box over again. Secure a strip of double-sided tape to the end of each ribbon, then press the ribbons down one by one to the back of the box. Make sure that the ends of the ribbons match up. For a nicer touch, weave the short ribbons through the long ribbons on the back, just like you did for the front. The woven ribbons are part of the design. If you feel that your gift is lacking something, you can buy or make a matching bow, then secure it to the box. Instead of covering up all your hard work, set the bow off to the side so that the weaving is still visible.
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One-sentence summary --
Cut four pieces of ribbon for the length of the box. Cut four pieces of ribbon for the width of the box. Set the first set of ribbons side-by-side down on the table. Set the box on of the ribbons around. Wrap the ribbons around the box and secure them with double-sided tape. Secure the next set of ribbons right above the first set. Flip the box over and weave the short ribbons through the first set of ribbons. Secure the ribbons to the back of the box. Add a decoration to the front, if desired.