To calculate the area of exterior walls, measure the perimeter of the house, or the combined length of all exterior walls. Exclude porches or other "appendages." Multiply the perimeter by the height of the roofline, or the spot where the top of an exterior wall meets the roof. If your house has gables (peaked parts of the roof), add half the height of a story to the total roofline height to get a ballpark approximation of the area including gables. Most houses have a height of 9 feet (2.7m) per story. Add 4.5 feet (1.4m) to account for any gables. For example, if your house is 24 feet (7.3m) by 35 feet (11m) and 2 stories tall, the area in square feet would be (24 + 24 + 35 + 35) x (9 + 9 + 4.5) = 118 x 22.5 = 2,655. To estimate the cost of painting a room, find the total wall area of the room. Measure the perimeter of the room (the combined lengths of all sides of the room) and multiply it by the height of the ceiling. For example, if the perimeter of your room is 55 feet (17m) and the ceiling is 10 feet (3.0m) high, the area of the walls is 550 square feet (51m2). If the room has any doors and windows, measure the area of each and subtract it from the wall area for a more accurate estimate. Multiply the length of each door or window by its width to find the area. If you're going to paint your ceilings, you'll need to factor them in as well. Measure the length of the ceiling and multiply it by the width to get the total area. For example, if the ceiling is 12 feet (3.7m) by 10 feet (3.0m), the area is 120 square feet (11m2). In addition to the walls and ceilings, you may wish to paint your doors and doorframes as well as other trim, such as baseboards. To save the trouble of measuring each of these individually, you can use these tricks to get a good estimate: Most doors are 21 square feet (2.0m2), so simply multiply that area by the number of doors you plan to paint. Likewise, the average window is 15 square feet (1.4m2). While you won't be painting the windowpanes, the amount of paint you'd need to cover them should also be roughly how much you'd need to cover the window frames and door frames in a given room. To estimate the area of your baseboards, calculate the perimeter of the room and subtract 3 feet (0.91m) per door. Multiply that by the trim width of your baseboard (e.g., .5 feet (0.15m). To determine the total square footage you'd like to cover, measure all the surfaces you'd like to paint throughout the entire house, including walls, ceilings, doors, and trim. Add up the results. For example, this might yield a total area of 2,350 square feet (218m2).
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One-sentence summary -- Multiply the house perimeter by the roofline height to measure the exterior. Multiply a room's perimeter by the ceiling height to find the wall area. Measure the area of the ceilings if you plan to paint them. Measure any doors, windows, and trim you plan to paint. Repeat this process with every room to find the total area.

A marketing case study describes a "success story" between a business and a client. Ideally, the client has recently interacted with your business, and is enthusiastic about contributing a positive message. Choose a client close to your target audience, if possible. Request high-level involvement from the client's side for best results. Even if the client only wants to vet the materials you send them, make sure the person involved is high up in the organization, and knowledgeable about the companyclient relationship. A typical marketing case study begins by describing the client's problems and background. It then rapidly moves on to describe how your company strategically approached these problems, and succeeded in fixing them to a high standard. Finish by describing how you can apply similar solutions across the industry. The entire case study should divide into about three to five sections. Collaboration with the client is especially helpful here, so you make sure to include the points that left the most impact and biggest impression. If your target audience wouldn't immediately identify with your client's problem, start with a more general intro describing that type of problem in the industry. Use bold text and headers to divide the case study into easy-to-read sections. Start each section with short, action sentences and strong verbs. Use numeric examples that demonstrate how effective your solutions were. Make this as clear as possible, using actual numbers instead of (or in addition to) percentages. For example, an HR department could show impressive retention numbers following a process change, while a marketing team could demonstrate past sales boosts from its service. Charts and graphs can be great visual tools, but label these with large letters that make the positive meaning obvious to people who aren't used to reading raw data. You'll definitely want to quote positive recommendations from your client. Often, however, the person writing these will not have a marketing background. Ask the client whether you can write the statements for them, although of course the client will sign off on these before publication. These are typically brief quotes just one or two sentences long, describing your service in a positive light. Include photos and other images to make your case study more attractive. One tactic that can work well is to solicit photographs from the client. An amateur digital photograph of the smiling client team can add a genuine touch. Make your marketing case study widely available. Try using Amazon Web Services, Microsoft's Business Hub, or Drupal. Send copies of the study to the client you collaborated with as well, along with a certificate thanking them for their involvement.
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One-sentence summary --
Ask permission from a client. Outline the story. Keep the study readable and powerful. Include actual numbers. Solicit quotes or write them yourself. Add images. Spread the word.