You can only get what you focus on most, so be careful on what you decide to focus on. Take control of your surroundings. Add warmer lighting, or better air conditioning or put your facility in an order that allows your mind to not wander off thinking about how you are uncomfortable in your space. Slow down, take a deep breath and visualize yourself getting the end outcome that you have decided to concentrate on.
Athletes do it all the time, and so can business professionals.
State your objectives in positive tense. A wise person once said that you should never be against anything, but always be for that which you want most. Don't be against dumb or lazy employees, but rather be for hiring, attracting, and inspiring folks that you decide to have on your team to fully realize their potential while accomplishing the goals of the organization. Plan your day. It's ok to NOT have a open door policy.