Here is the main problem with most To-Do Lists: they are a potpourri of goals, projects, and tasks. They can be psychologically counterproductive as many items remain on the list at the end of the day. For example, here is an example of some items on a to-do list:
Lunch with Dave
Call Susan
Review the new contract
10-Day Vacation
Learn Chinese
The first three items are tasks; however, the last two items, are a project (10-Day Vacation) and a goal (Learn Chinese). An excellent 10-day Vacation requires planning and prep work. Learning Chinese is a goal that requires daily actions (speaking, listening, and writing) in order to know the language well enough to speak and write fluently. Instead, these larger should be broken down into smaller tasks.
The 10-Day Vacation initial tasks might include deciding where to go, researching hotels, or purchasing plane tickets. The 2006 goal to learn Chinese would include registering for a course, locating a native speakers for weekly casual conversation, and planning a way to incorporate a daily practice into one's life. As the saying goes, you eat an elephant one bite at a time.
This is why I suggest using the following three lists in your planning: a goals list, a project list, and a daily task list. They represent different timescales. The top tasks for each day should be driven by both you annual goals and your active projects; however, be ready for the arrival of maintenance, miscellaneous, and surprise tasks which will suddenly appear on the daily list too. Just make sure that the ‘tyranny of the urgent’ does not overwhelm those important tasks that will help you achieved.
Bottom Line: STOP writing out to-do lists. Instead, create daily tasks list.