1. Take care of yourself - sleep, diet, exercise - all the stuff they taught us 4th grade Health.
2. Make lists, and prioritize everything on the basis of two things: importance (how much real value it contributes to your life goals) and urgency (how soon you have to do it before it becomes a bigger problem that requires more time). Block out large chunks of your available time to work exclusively on "important" tasks, with periodic short breaks to deal with any "urgent" things (which are usually important to someone else, but trivial to you in terms of their contribution to your goals).
3. Most "important" work can be planned in advanced, so protect your blocks of "important" time from interruptions. Be brutally selfish here, and remind anyone who tries to interrupt that you'll be available to deal with "urgent" tasks at 9:30 (or whenever).
4. When you take a break to handle "urgent" items, multi-task. Do two or three things simultaneously, and don't spend any more time on them than necessary. Finish them off fast.
5. Share your goals and dreams with others, and ask for their help if there is something they could do to that would allow you to be more productive. Be sure to thank them for each thing they do, and never stop telling them how important their support is to you.