Article: "Pump filters" may be your cheapest option in this category, but can be slow and tedious. For long trips, look into "gravity filters," which are typically a pair of bags connected by a hose. The bag with the filter is filled with water, then hung up to let the water drain through the filter into the clean bag. This is a fast, convenient option that doesn't require you to carry around a supply of disposable filters. These filters do not protect against viruses, but they are effective against bacteria. Not all wilderness areas require protection against viruses, however, especially in the US. Check your regional disease control center or a tourist information center for more information on the risks in your region. Tablets are slow but cheap, and are effective against most bacteria and viruses. Tablets come in two common types:  Iodine tablets should be left in the water for at least 30 minutes. They are sometimes sold with a companion tablet for hiding the iodine taste. Pregnant women and people with thyroid conditions should not use this method, and no one should use it as their main source of water for more than a few weeks.  Chlorine dioxide tablets normally have a 30 minute wait time. Unlike iodine, they are effective in areas contaminated by the bacterium Cryptosporidium – but only if you wait 4 hours before drinking. Ultraviolet light lamps can kill bacteria and viruses, but only if the water is clear and the light is applied for long enough. Different UV lamps or light pens have different intensities, so follow the manufacturer's instructions. This is an extremely effective method of killing pathogens, as long as you let the water boil for at least one minute. It may not be convenient to boil water several times a day, but be aware that you won't need additional filtration if you're already boiling water for your evening meal or morning coffee. At high elevations, boil the water for at least three minutes, since the water will boil at a lower temperature in the thin air. The high temperature, not the boiling action itself, is responsible for killing bacteria and viruses. Plastic bottles are only designed to be filled an used once, since the plastic can break down over time, adding potentially harmful chemicals to the water and even harboring bacteria. Even aluminum bottles often have an inner plastic coating, and are not dishwasher safe, making them difficult to clean. If you're lucky enough to find a mountain spring bubbling from the rocks, it's usually safe to drink directly from it – but this does not apply even a couple feet (0.6 m) away. This is not a foolproof rule, and may be dangerous in agricultural regions, areas with historic mining, or lower-elevation areas near population centers.
Question: What is a summary of what this article is about?
Consider a physical filter. Learn about chemical disinfection. Try UV light treatment. Boil water. Use stainless steel water bottles. Drink straight from the spring source.
Article: When you’re trying to get things done fast, it might be tempting to multitask. However, doing multiple things at once will only slow you down. Pick one task and work on only that task until you’ve run out of time or finished it. Then, you can move on to the next thing that you need to do.  Even if you have multiple similar tasks to do, only do one thing at a time and don’t jump back and forth between them. For example, work on only sending emails or finishing a report. Don’t finish a page of the report and then send a few emails before working on the report again. Try to accomplish multiple tasks in a row in the same spot, like by your computer or on your phone. Then, you can get all of the things done that you need to do in one place without wasting time by starting and stopping tasks to move from place to place.  For instance, if you have to look up the phone number for a few local businesses and buy something online, you can use your phone to look up the contact information, and then place the order through an app. Then, you can put your phone away and focus on completing other tasks. If you have a few phone calls to make, make them consecutively, and then take a break from using your phone while you finish other tasks. Try to get your most difficult tasks out of the way in the morning when you have the most energy and motivation, which will help you work through them quickly. Aim to finish all of your difficult tasks before noon, leaving the second half of the day for less important tasks and planning for the next day. For instance, if you have a term paper to finish and a few calls to make, you should plan to finish the paper in the morning, and make the phone calls in the afternoon. That way, the paper will be completed and you can knock out the smaller tasks quickly. When you’re trying to work quickly, distractions can throw off your schedule. Wear a pair of headphones and listen to music, an audiobook, a newscast, or a podcast to block out distracting noise. This is especially helpful if you’re working around other people who are talking or generally being loud. Avoid burnout by giving your mind and body time to rest throughout the day. Some experts recommend 10 minutes of rest for every 50 minutes of work, but you can adjust this as needed. On your break, check your text messages, grab a cup of coffee, go for a walk, or have a snack. Even if you don’t feel like you need a break, take a short one anyway. Stand up and stretch, or take some time to drink some water. Your body will thank you!
Question: What is a summary of what this article is about?
Focus on doing only one task at a time. Group tasks based on where or how you do them. Do your most challenging tasks in the morning. Put on a pair of headphones to block out distracting noise. Reward yourself with frequent, short breaks to refresh your energy.