meditation, working with your hands such as carving, sculpting, painting or so on, iado, ti chi, hobbies and reading all have helped me at times. i force myself to focus on the task that i am busy with to try to drowned out all other thoughts that could be harmful.
my favorate way to help myself to combat anxiety is to meme shit post and troll. i love to troll the hell out of youtube and yahoo answers. i make sure to try to keep my trolling on the lighter side and make it apparent that its all in fun.