Make sure you can see the goals and tasks as you work through the day, so you'll keep yourself on schedule. If you seem to be falling behind, adjust the tasks, but stay aware of what you think you need to get done.
Some people are notoriously bad time estimators.
If that's you, let this exercise gradually teach you to get better at figuring out how long things are really going to take. Most big projects should have at least 10 to 20 movable parts so train yourself to identify them and figure out the best way to get them done in an enjoyable but efficient fashion. This will also help you improve on your time estimating skills. Write notes as you finish tasks, keeping a visible chart of which items you've completed and goals you've met. This will keep you on track and also serve as a reward system.