A 2014 study from YouGov found that one in five people who experience anxiety have no coping mechanisms to help them through it. While the health service suggests treatments such as therapy or antidepressant medicines, there are other things you can do to help manage those feelings. One of these methods is known as the “333 rule”. According to Healthline, the 333 rule is an informal technique for coping with anxiety. It can help to keep you grounded and “calm down in a moment where you are feeling particularly anxious or overwhelmed”.