Our minds are always buzzing with information. Even when we are sleeping our minds are flooded with dreams constantly. It can be hard to calm the mind down at times, especially when you have a lot of things running through your mind.
The best thing to do when your mind is overwhelmed with lots of thoughts. Is to take deep breaths in and out, and center yourself to the present moment. If you are doing a task, try to focus your energy on that task. If you are not busy. Focus on an object, or your surroundings. Take a look outside, and enjoy the scenery.
Thoughts will continue flooding your mind, but if you continue doing the things above. The mind will eventually calm down. Patience is key. When your mind is calm. Solutions become clear.
Psychology of Mindfulness 