You probably have read and heard that focus is the most important thing. I like to keep experimenting with this: systems are good but it will help to try out new ways to keep fresh and increase focus during the day.
One really simple technique is to start today by defining your three most important tasks that would really make this day a success. Go nuts, write them down on a piece of paper and have it stick around today.
Don’t get distracted and get it done.