It is a challenge to stay clear - and focused - especially as an entrepreneur or a salesperson in your territory. How to do it? My quick take:
Write your goals down. You can't improve what you don't measure.
Let others know what you are working on - they will help you get there.
Make time to reflect - it is the only way you can get out of what you are working on for new perspective.
Check in with yourself on Monday - go through your week, and on Friday, have a little sit-down with yourself and review what you accomplished, and whether you stayed on track.
Focus, focus, and re-focus. Rinse, and repeat.