In one sentence, describe what the following article is about: Jiu jitsu is a great foundation to martial arts practice because the fighting style relies on balance.  Much of the jiu jitsu takes your opponent's strength and uses it against them. If you belong to a Jujutsu school, you'll begin with the elementary throws and grapples. One of the first skills you learn is to relax during training. This enables you to train longer without becoming exhausted and also is good preparation to becoming a ninja. The core of Jujutsu is fighting without weapons. Some larger cities have ninjutsu schools that are open for willing patrons. This is the best way to learn the true techniques a of ninja’s fighting style. The core idea of ninjutsu is stealth. A modern fictitious ninja who incorporates this fighting style is Batman. Although knowing a traditional Japanese style of fighting is preferred, receiving any type of martial art training will help. You can always adapt the ways of your martial arts style into a stealth based style. You can also seek out further training after receiving a basic martial arts training.
Summary: Learn Jiu jitsu. Discover ninjutsu organizations. Learn from a trainer.

Tap the grey app with 2 gears on it. You'll usually find it on the Home Screen. It's near the top of the Settings page. It will turn green {"smallUrl":"https:\/\/www.wikihow.com\/images\/1\/15\/Iphoneswitchonicon1.png","bigUrl":"\/images\/thumb\/1\/15\/Iphoneswitchonicon1.png\/46px-Iphoneswitchonicon1.png","smallWidth":460,"smallHeight":300,"bigWidth":"46","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an iPhone\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"}. This option is near the bottom of the screen. Doing so will select your entire contacts list as the exception to Do Not Disturb. You will no longer receive calls from people who aren't saved in your Contacts app.  This method blocks calls from any numbers that aren't saved in your Contacts app, meaning that you might miss out on a work- or appointment-based call. Do Not Disturb also prevents other app notifications (e.g., text messages, email, social media) from showing up as alerts.
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One-sentence summary -- Open your iPhone's  Settings. Scroll down and tap  Do Not Disturb. Tap the white "Do Not Disturb" switch . Tap Allow Calls From. Tap All Contacts.

Problem: Article: Baking soda absorbs and neutralizes all kinds of unpleasant smells and is a great ingredient to get rid of unwanted garlicky odors that may have been worked into a cutting board or other kitchen utensil. Combine the baking soda and water in a small bowl. Stir them together with a spoon until a thick, grainy paste forms. If not all of the baking soda is absorbed into the water, add a few more drops. If you’ve used, for example, a cutting board or measuring spoons with garlic and they still smell, try getting the smell off with the baking soda paste. Scoop the paste onto the surface of the utensil. Rub the paste into the object. Do this for 1–2 minutes to make sure that the baking soda paste eradicates all of the garlic odor. Some kitchen utensils may have the smell of garlic deeply engrained in them. In this case, if you have a lemon on hand, try cutting it in half and using half the lemon to rub the paste into your garlicky kitchen utensil. The lemon’s acidity will help further neutralize the garlic odor. Turn on your kitchen sink’s tap and hold the cutting board, measuring spoon, or other kitchen item beneath the running water. Rub 1 hand back and forth across the paste-covered surface until you’ve rinsed off all of the paste. Set your utensil in a drying rack and give it 2–3 hours to dry. Once it’s dry, sniff the cutting board. The unpleasant garlic smell should be gone! If you’re out of baking soda, vinegar works equally well as a deodorizer. You can use it to clean the same items that you can clean with baking soda. Just pour a little vinegar onto a clean sponge and scrub it across the surface of whatever kitchen items have an unpleasant garlicky smell. This works well on plastic cutting boards, frying pans, silverware, and even your stovetop. Also try pouring vinegar into a plastic spray bottle and spritzing it across larger items that smell like garlic. This works well for larger cutting boards and stovetops.
Summary:
Make a paste of 3 parts baking soda and 1 part water. Rub the baking soda paste onto utensils that have a garlicky smell. Scrub the paste in with a lemon for particularly resistant garlic odors. Rinse the kitchen utensil clean with cold water. Scrub garlicky items with vinegar if you don’t have baking soda.