Developing a system that helps you stay on top of things is essential.
First of all, pick a calendar system. For example, Outlook is a great tool that can integrate different aspects of your life: client-related meetings and assignments, as well as personal-life activities. Outlook is also synced with your Blackberry, which makes it easier for you to be constantly aware of your meetings and projects.
A to-do list is a must. Update it regularly, first thing in the morning or ...