In one sentence, describe what the following article is about: An electronic fitness tracker (usually in the form of a watch that you wear on your wrist) can be an excellent way to track your heart rate. In addition to keeping track of your daily steps taken and activity levels, most of these trackers also keep record of your sleeping patterns, heart rate, and even allow you to log in your calories consumed. Each model of fitness tracker comes with a variety of features. Make sure the one you purchase has a heart rate feature before you buy it. Some of the most popular fitness trackers with heart rate monitoring include the Fitbit Charge 2, the Garmin Vivosmart HR+, the TomTom Spark 3, and the Garmin Forerunner 35. There are a variety of heart rate monitors on the market. While the fitness trackers may be the most popular, they aren't necessarily the most accurate. You can try a band that goes around your chest to monitor your heart rate for the highest levels of reliability. You can even consider arm band monitors, earphone monitors, and headband monitors. If you are concerned about your heart rate, the most accurate way to measure it is by letting a medical professional handle it. Make an appointment to see your doctor and tell them what symptoms you are experiencing that are causing you concern. Your doctor may check your heart rate with a stethoscope in your chest, using their fingers on your wrist, or by placing a finger sensor on the tip of your finger.
Summary: Wear a fitness tracker. Wear another kind of heart rate monitoring device. Make an appointment with your doctor.

Pour the vodka into a large mixing bowl. Open the envelopes of gelatin and sprinkle the gelatin over the vodka. Set it aside for about five minutes. This will give the gelatin time to bloom, or soften. For 7 teaspoons (22.5 g) of unflavored gelatin, you'll need three envelopes of gelatin. While the gelatin blooms, bring the water to a boil in a kettle, or in a saucepan on the stove. When the water is ready and the gelatin has had time to soften, add the boiling water to the bowl with the vodka and gelatin mixture. Stir the mixture with a spoon until the gelatin is dissolved. When the gelatin is dissolved, pour the hazelnut liqueur, raspberry liqueur, and sweetened condensed milk into the bowl with the gelatin mixture. Stir well to completely incorporate all of the ingredients. To make the jello shots non-alcoholic, replace the vodka and liqueurs with water, juice, or milk. Spray the inside of the brain molds with a very small amount of cooking spray. You can also use your fingers or a brush to apply a very thin layer of cooking oil or vegetable shortening to each mold. Wipe out excess spray or oil with a clean cloth to avoid flavoring the jello. This will prevent the jello from sticking, and make it easier to remove the brains once they've set. Place the silicone brain molds onto a baking sheet. Pour enough jello into each brain to fill it half-way with jello. This will leave plenty of room for the raspberry filling and more jello on top later. Putting the molds on a baking sheet will make them easier to transport to and from the refrigerator. Transfer the half-filled brain molds to the refrigerator and let the jello set for about 30 minutes. You want the jello firm, but not completely set. Don't wait any longer than an hour, or the second layer of jello may not adhere properly to the first layer. While you're waiting for the jello to firm up, cover the remaining jello with a sheet of plastic wrap and leave it on the counter. Once the jello has had time to firm up, remove the brains and the raspberry filling from the refrigerator. Add a teaspoon (7 g) of raspberry filling to the jello in each mold. Don't let the filling touch the sides of the mold, otherwise the two halves of the brain won't seal together properly. You can add as much or as little filling as you like, as long as the filling doesn't touch the mold. When the filling has been added, top up each mold the rest of the way with the remaining jello. Cover the molds with a piece of plastic wrap and transfer them to the refrigerator. Let the jello set overnight, or for at least four hours.
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One-sentence summary -- Combine the vodka and gelatin. Add the boiling water to dissolve the gelatin. Add the alcohol and condensed milk. Grease the brain molds. Pour the first layer of jello. Refrigerate the jello to set it. Add the raspberry filling. Fill the molds and let the jello set overnight.

Problem: Article: Fanfiction is always based on an existing work of art. You are essentially making a story that expands or otherwise alters existing fiction. The mediums you might choose from are endless. Fanfics have been written about books, movies, television shows, video games, and just about anything else with a narrative base and a fandom to admire it. You should pick a fictional universe you already feel closely to. Common choices for fanfic are Star Wars, Harry Potter, and a number of anime and manga franchises. The choice of universe you choose to base your own work on will have the largest impact on your story and the way it turns out. Certain universes also favour certain approaches in fanfic. It's important to note however that your choices as a fanfic writer are limitless. You can do anything you want to the source material, even if that means transforming it into something else entirely. Most fanfiction tends to be based on a science-fiction or fantasy-themed universe, like Harry Potter or Star Trek. These are great to base fanfics off of because they offer huge universes with an endless amount of storytelling potential. Look online and read up everything you can about the given universe. Even if you're planning on breaking free of the established canon (what the author/director/etc has already established) with your fanfic, it helps a lot to know the rules before you break them. The best ideas you'll get for your work will be inspired by the source material itself. With that said, it still helps to see what other fans have done with the same ideas. Using a website like Fanfiction.net, Archive of Our Own, and Wattpad, or you can take a look through some fanfiction that matches your on source material. Read some stories people have written. Most importantly, get a grasp of the ways in which people use and adapt the source. In looking for fanfiction to read, you may get the looming impression that a lot of fanfiction lacks for quality. Being part of the fanfic community means acknowledging that not everyone is at the same level of skill. Most fanfiction is amateurish, and a lot of it frankly isn't worth reading. It takes patience to find the great stuff.
Summary:
Choose source material to work from. Read up on the fictional universe. Read some fanfiction.