"During finals it can be easy to get overwhelmed with your work load. The best thing to do is try to focus on one task at a time. However, if you are having trouble finding your focus, the best thing to do is to take a few minutes to connect your body and breath with 5 easy yoga poses. You can do these when you wake up before you even leave your bed, or you could find a quiet space at the library to practice some mindfulness. Here are 5 restorative poses to re-center and find your focus." From the Her Campus Site
This article teaches you quick exercises that can help you destress and refocus, including controlling your breathing, guided imagery, meditation, progressive relaxation, and biofeedback
This phone app "will help you to understand what causes your anxiety, monitor your anxious thoughts and behavior over time and manage your anxiety through self-help exercises and private reflection." (From the website)